About California Road Map
Explore the road map of
California state of USA showing interstate highways, US highways and other road network.
Interstate Highways of California
Throughout California, a vast network of interstate roads stands among the largest in the nation. By early 2026, records showed about 2,460 miles of these high-speed routes weaving across landforms, linking cities, harbors, farmland, innovation zones, and borders with Mexico and Nevada. Daily work trips, interstate journeys, cargo transport, fire departments racing to flames, and visitors making their way through resorts all rely on these routes every single day. Stretching over 163,000 square miles, the state's size is matched only by the flow of people and goods moving along these roads each hour. Across California, the Interstate network moves more than just cars - it carries hundreds of billions in commerce, farming supplies, factory outputs, and shipped products annually. Not simply roads, these routes power much of the state’s economy without drawing attention.
The Major North-South Corridors
From San Ysidro near Mexico, I-5 runs north more than seven hundred ninety-six miles - the longest highway across California. This stretch connects cities like Redding, Sacramento, Bakersfield, and Los Angeles before reaching south toward the border with Oregon. Through these places, heavy traffic moves: trucks full of apples and avocados from farm regions, vehicles hauling imports from coastal terminals, people traveling between nations. The road forms a backbone, supporting both local life and national movement. A heavy flow of trucks moves along this route, more than many similar routes across the U.S.; heavy traffic often brings delays in Los Angeles County, plus the Grapevine stretch climbs over the Tehachapis with frequent stops, while the Sacramento area also sees constant movement. Running north from San Diego, I-15 passes through Riverside, then San Bernardino, crosses into Nevada via Barstow - linking Southern California directly to Las Vegas. Tourism, supply chains, and armed forces rely heavily on this highway, particularly around Ontario and Barstow.
The Major East-West Corridors
Starting in Santa Monica, Interstate 10 stretches 237 miles eastward across Southern California, passing through Los Angeles, San Bernardino, then entering Riverside County’s desert regions. Heavy traffic moves along this route, especially deliveries brought from the Ports of Los Angeles and Long Beach to central shipping hubs. Running parallel but in different landscapes, Interstate 80 measures 199 miles long from the San Francisco Bay Area onward. Its path carries it across the Sacramento area before climbing into the Sierra range near state borders. People travel along it daily, especially during peak hours. Heavy trucks roll by constantly, moving goods across distances. A main path leads north toward Lake Tahoe and then on to Reno. Far below in the east, near Barstow, Interstate 40 runs across desert land. This highway links distant towns like Needles before entering neighboring Arizona. For transporting materials nationwide from regional hubs, it plays a key role.
The Role of Interstates in Daily Life and the Economy
Across California, Interstate roads shape every day for countless people. Getting to job or school starts with these routes, just like heading out to see loved ones or visit distant relatives. Students make their way to college campuses because of them, visitors make their way through parks and coastal towns too. Without these systems, farming regions wouldn’t move goods, ports wouldn’t deliver containers, factories wouldn’t operate on tight schedules, tech centers wouldn’t deliver products under pressure. Goods flowing from the Port of Los Angeles and Long Beach often travel along I-10, then shift to I-5 or I-710 once inside the city. Moving further outward, freight finds its way to storage hubs via these routes, stretching from Southern California into regional hubs. Up north, produce grown in the Central Valley reaches markets using mainly I-5 and a smaller share on I-580. Farther west, tech-related cargo relies heavily on Interstate 80 near Sacramento, while another key route, I-280, connects manufacturing zones around San Jose before merging with San Francisco area networks.
Current Challenges and Traffic Conditions
Even though they matter, California’s Interstate highways struggle with growing traffic, old construction, and rising upkeep demands. Right now, in 2026, heavy congestion shows up on pieces of I-405 in Los Angeles, stretches of I-5 passing through the Grapevine and downtown LA, portions of I-10 across the Inland Empire, along with sections of I-80 in the Bay Area. A big part of the Interstate network rose during the 1950s and 1960s, meaning many parts are nearing fifty years - past when original engineering standards were reliable. Widening roads sits at the center of Caltrans’ efforts, along with introducing extra lanes, upgrading exchange points, yet replacing old bridges faces hurdles - expenses remain steep, nature rules clash frequently, locals resist change too.
Recent and Ongoing Major Projects
Right now, major efforts focus on upgrading the I-405 through the Sepulveda Pass. Elsewhere, expanding I-10 runs across the Inland Empire region. Work continues along I-15 to enhance key sections in Riverside and San Bernardino areas. Over in Yolo County, repairs shape up at I-80 near the Yolo Causeway. Back in East Texas, progress marks the extension of I-69 - this stretch ties into California’s interstate network further west. Tolls are shifting online; automated collections spread while quick-access highways take shape under smart infrastructure plans meant to ease driving delays plus fund later upkeep needs.
The Future of California’s Interstate System
Even now, cross-state roads in California shape how the state grows and thrives. By 2040, hitting 40 million people means better, safer, faster travel won’t slow down. Work by Caltrans and local transport planners leans toward more efficient routes, stronger freight paths, safer conditions for everyone, along with cleaner tech like electric car stations and smart vehicle networks. Even with obstacles, Interstate highways stand as California’s most notable infrastructure feat - still shaping transportation, trade routes, and economic life well into future years.
Primary Interstate Highways
| Highway Number | Length in km | Length in mi | Southern or Western Terminus | Northern or Eastern Terminus | Formed |
|---|
| I-5 | 1,281.73 | 796.432 | Mexican border in San Ysidro, San Diego | I-5 at the Oregon state line | 1947 |
| I-7 | 486 | 302 | I-5 at Wheeler Ridge | I-5 in Stockton | proposed |
| I-8 | 276.77 | 171.98 | Nimitz Boulevard, Sunset Cliffs Boulevard in San Diego | I-8 at the Arizona state line | 1964 |
| I-9 | 486 | 302 | I-5 at Wheeler Ridge | I-5 in Stockton | proposed |
| I-10 | 391.57 | 243.31 | SR 1 in Santa Monica | I-10 at the Arizona state line | 1947 |
| I-15 | 462.3 | 287.26 | I-8 in San Diego | I-15 at the Nevada state line | 1957 |
| I-40 | 248.842 | 154.623 | I-15 in Barstow | I-40 at the Arizona state line | 1947 |
| I-80 | 330.03 | 205.07 | US 101 in San Francisco | I-80 at the Nevada state line | 1947 |
Auxiliary Interstate Highways
| Number | Length in mi | Length in km | Southern or Western Terminus | Northern or Eastern Terminus | Formed |
|---|
| I-105 | 18.82 | 30.29 | SR 1 in El Segundo | I-605 in Norwalk | 1982 |
| I-110 | 23.73 | 38.19 | SR 47 in San Pedro | I-10 in Los Angeles | 1978 |
| I-205 | 12.973 | 20.878 | I-580 near Tracy | I-5 near Manteca | 1970 |
| I-210 | 44.9 | 72.26 | I-5 in Los Angeles | SR 57 in Glendora | 1964 |
| I-215 | 55.06 | 88.61 | I-15 in Murrieta | I-15 in San Bernardino | 1982 |
| I-238 | 2.126 | 3.421 | I-580 in Castro Valley | I-880 in San Leandro | 1983 |
| I-280 | 57.51 | 92.553 | US 101/I-680 in San Jose | King and 5th Streets in San Francisco | 1955 |
| I-305 | 5.64 | 9.08 | I-80 in West Sacramento | SR 99 in Sacramento | 1981 |
| I-380 | 1.67 | 2.69 | I-280 in San Bruno | US 101 in South San Francisco | 1964 |
| I-405 | 72.415 | 116.541 | I-5 in Irvine | I-5 near San Fernando | 1964 |
| I-505 | 32.99 | 53.09 | I-80 in Vacaville | I-5 near Dunnigan | 1977 |
| I-580 | 75.55 | 121.586 | US 101 in San Rafael | I-5 near Tracy | 1947 |
| I-605 | 27.4 | 44.1 | I-405/SR 22 in Seal Beach | I-210 in Irwindale | 1964 |
| I-680 | 70.536 | 113.517 | US 101/I-280 in San Jose | I-80 in Fairfield | 1976 |
| I-710 | 24.249 | 39.025 | SR 47 in Long Beach | Valley Boulevard in Alhambra | 1984 |
| I-780 | 6.759 | 10.878 | I-80 in Vallejo | I-680 in Benicia | 1976 |
| I-805 | 28.016 | 45.087 | I-5 in San Ysidro, San Diego | I-5 in Sorrento Valley, San Diego | 1959 |
| I-880 | 45.698 | 73.544 | I-280/SR 17 in San Jose | I-80/I-580 in Oakland | 1984 |
| I-905 | 8.964 | 14.426 | I-5 in San Diego | Mexican border near Otay Mesa | proposed |
| I-980 | 2.027 | 3.262 | I-880 in Oakland | I-580/SR 24 in Oakland | 1981 |
Business Routes
| Number | Length (mi) | Length (km) | Southern or Western Terminus | Northern or Eastern Terminus | Formed |
|---|
| I-5 BL | - | - | I-5 in San Diego | I-5 in Oceanside | c. 1960 |
| I-5 BL | 1.1 | 1.8 | I-5 in Arbuckle | I-5 in Arbuckle | - |
| I-5 BL | - | - | I-5 in Williams | I-5 in Maxwell | - |
| I-5 BL | - | - | I-5 in Willows | I-5 in Orland | - |
| I-5 BL | 4.2 | 6.8 | I-5 in Red Bluff | I-5 in Red Bluff | - |
| I-5 BL | 3.7 | 6 | I-5 in Dunsmuir | I-5 in Dunsmuir | - |
| I-5 BL | 3.8 | 6.1 | I-5 in Mount Shasta | I-5 in Mount Shasta | - |
| I-5 BL | - | - | I-5 in Weed | I-5 in Weed | - |
| I-5 BL | - | - | I-5 in Yreka | I-5 in Yreka | - |
| I-8 BL | 8.15 | 13.12 | I-8 in El Cajon | I-8 in Lakeside | - |
| I-8 BL | 4.25 | 6.84 | I-8 in Alpine | I-8 in Alpine | - |
| I-8 BL | 4.25 | 6.84 | I-8 in El Centro | I-8 in El Centro | - |
| I-8 BL | 2.18 | 3.51 | I-8 in Alpine | Bus.I-8 in Yuma, AZ | - |
| I-10 BL | 7.9 | 12.7 | I-10 in Blythe | I-10 in Blythe | - |
| I-15 BL | - | - | I-15 in Escondido | I-15 in Escondido | - |
| I-15 BL | - | - | I-15 in Lake Elsinore | I-15 in Lake Elsinore | - |
| I-15 BL | - | - | I-15 in Norco | I-15 in Norco | - |
| I-15 BL | - | - | I-15 in Victorville | I-15 in Victorville | - |
| I-15 BL | - | - | I-15 in Barstow | I-15 in Barstow | - |
| I-15 BL | 3.6 | 5.8 | I-15 in Baker | I-15 in Baker | - |
| I-40 BL | 3.4 | 5.5 | I-40 in Needles | I-40 in Needles | - |
| I-80 BL | 13.82 | 22.24 | I-80 in West Sacramento | I-80 in Sacramento | c. 1980 |
| I-205 BL | - | - | I-205 in Tracy | I-5 in Lathrop | - |
U.S. State Highways in California
From coast to desert, California’s highway network stands out for size and layers of complexity. Not just Interstates, there are about 15,200 miles labeled as State Routes - marked with green and white "SR" signs you see everywhere. Oversight comes down to Caltrans, who formally name and keep up these paths. They link farmland, backcountry lanes, small villages, beach suburbs, and rural crossroads - places bypassed by fast freeway routes. Alongside interstates, they make up the full system of state highways - handling most of California's regular driving, shipping, and visitor movement over its vast 163,000 square miles.
The Role and Importance of State Routes
Not every road built matters equally - Interstates push traffic far between big urban centers at fast speeds. State Routes do different work, connecting quieter places like rural crossroads or beachside streets to bigger hubs. People living far from interstate centers rely heavily on these routes daily. Getting kids to school, driving to work, reaching a doctor’s office, delivering produce - all these actions often happen along State Routes, not on grand highway systems. These roads matter just as much for tourism, offering routes like the Pacific Coast Highway (SR 1), the Redwood Highway (SR 101), and paths through the Sierra Nevada - SR 49, SR 89, SR 395. Freight often travels along State Routes, particularly food, crops, and wood coming from farms in the Central Valley, forests up north, plus shipments shipped at lesser harbors or storage sites.
Major State Routes and Their Significance
Starting at Dana Point in Orange County, State Route 1 winds its way along the coast - over six hundred fifty-six long miles - down to Leggett near Mendocino County. Known by many names, like the Pacific Coast Highway or simply PCH, this stretch has become one of the world’s standout routes for raw natural beauty. What sets it apart? Recognition as both a National Scenic Byway and an All-American Road. Views shift constantly: waves crash, sun sets over cliffs, towns drape gently beside the road. Notable for its length and visual impact, it stands apart from typical highways. Along Northern California's shoreline, State Route 101 serves as the main coastal highway, linking cities from Los Angeles to Eureka. Stretching more than 410 miles, State Route 99 stands as California's longest state route, cutting across the Central Valley from Wheeler Ridge down to Red Bluff. This path dominates movement within the region, supporting farming routes and local journeys alike. Farther east, another key route appears - State Route 395 - that follows the high desert and climbs beside the Sierra Nevada range. It opens gates to places like Mammoth Lakes, Bishop, Lone Pine, while ending near Death Valley too. One key route is SR 118, known as the Ronald Reagan Freeway. Another stands out: SR 134, also part of the Ventura Freeway. Then there's SR 60 - the Pomona Freeway - that connects cities in southern Los Angeles County. SR 91, called the Riverside Freeway, serves heavy traffic between urban areas. Moving eastward, SR 8 carries vehicles along Imperial Highway under different conditions. Farther north, SR 49 follows an older path - the original route taken during California’s gold rush era through mountainous foothills.
Current Facts and Figures (2026)
Right now, in early 2026, Caltrans looks after about 15,200 miles of state roads plus over 50,000 lane-miles of highway across the state - Interstate routes included. Every year, those roads see more than 200 billion driver trips roll through them. Take State Route 99, for instance - it ranks among the most crowded roads outside interstates, with certain stretches moving beyond 100,000 vehicles daily. Winding through coastal towns, State Route 1 draws crowds like few roads do. Over twelve thousand bridges connect its paths, alongside scores of underground tunnels. Snow melts slowly in winter mountains, making road crews pause for danger zones. Each year brings changes across California as phone numbers shift and routes get revised. Growing communities need fresh solutions for how people move.
Challenges and Ongoing Improvements
Keeping California's state highways running isn’t cheap nor simple. Built during the 1950s and 1960s, many sections are aging out. Heavy traffic slows movement on SR 99 across the Central Valley. SR 101 faces similar issues in the Bay Area and further south along the coast. Problems also hit SR 91 in the Inland Empire. Even SR 1, winding through Big Sur, struggles under weight. Landslides, floods, rising sea levels, wildfires, plus efforts to strengthen buildings against earthquakes stay high on the list of issues. Work at Caltrans moves forward - expanding main routes, introducing new lanes, swapping old bridges for stronger ones, upgrading safety elements, while adapting systems to handle shifting weather patterns. Right now, key initiatives span several regions: expanding SR 99 and building fast-moving lanes across the Central Valley, refining traffic paths along SR 101 in Sonoma and Marin, shifting SR 1 through a new route in Big Sur, alongside steady progress adding express routes on SR 91, SR 60, and SR 10.
The Future of California’s State Highways
What comes next? Caltrans has its eyes on building a stronger, cleaner state highway network - safer, smarter, faster, better for everyone. Charging stations for electric cars, smarter traffic tools, linked vehicle tech, and ways to handle weather shifts - these sit near the top. Cutting down carbon output from driving and giving fairer access to underpowered areas stand high on the list too. Even with all the obstacles, Cal’s state roads still shape how folks live, travel, farm, sell goods, and visit places throughout a diverse and vital part of America.
Mainline Routes
| Number | Length in mi | Length in km | Southern or Western Terminus | Northern or Eastern Terminus | Formed |
|---|
| SR 1 | 655.845 | 1,055.48 | I-5 in Dana Point | US 101 near Leggett | 1934 |
| SR 2 | 87.295 | 140.488 | Centinela Avenue in Santa Monica | SR 138 near Wrightwood | 1934 |
| SR 3 | 146.369 | 235.558 | SR 36 near Peanut | Ball Mountain Little Shasta Road in Montague | 1964 |
| SR 4 | 197 | 317 | I-80 / San Pablo Avenue in Hercules | SR 89 near Markleeville | 1934 |
| SR 7 | 6.718 | 10.812 | Mexican border east of Calexico | I-8 / CR S32 south of Holtville | 1990 |
| SR 9 | 38.497 | 61.955 | SR 1 in Santa Cruz | SR 17 in Los Gatos | 1934 |
| SR 11 | 2.7 | 4.3 | SR 125 / SR 905 in Otay Mesa | Mexican border at Otay Mesa East Port of Entry | 1994 |
| SR 12 | 140.64 | 226.34 | SR 116 in Sebastopol | SR 49 near San Andreas | 1934 |
| SR 13 | 9.73 | 15.66 | I-580 in Oakland | I-80 / I-580 in Berkeley | 1964 |
| SR 14 | 116.645 | 187.722 | I-5 near Santa Clarita | US 395 near Inyokern | 1964 |
| SR 15 | 5.59 | 9 | I-5 in San Diego | I-8 in San Diego | 1957 |
| SR 16 | 111.17 | 178.91 | SR 20 near Rumsey | SR 49 near Drytown | 1934 |
| SR 17 | 26.49 | 42.63 | SR 1 in Santa Cruz | I-280 / I-880 in San Jose | 1934 |
| SR 18 | 117.21 | 188.63 | SR 210 in San Bernardino | SR 138 near Pearblossom | 1934 |
| SR 19 | 4.4 | 7.1 | Rose Street at the Lakewood-Bellflower line | Gardendale Street at the Bellflower-Downey line | 1934 |
| SR 20 | 211.882 | 340.991 | SR 1 in Fort Bragg | I-80 near Emigrant Gap | 1934 |
| SR 22 | 14.725 | 23.698 | SR 1 in Long Beach | SR 55 in Orange | 1934 |
| SR 23 | 32.03 | 51.55 | SR 1 in Malibu | SR 126 in Fillmore | 1934 |
| SR 24 | 13.492 | 21.713 | I-580 / I-980 in Oakland | I-680 in Walnut Creek | 1934 |
| SR 25 | 74.632 | 120.109 | SR 198 east of San Lucas | US 101 near Gilroy | 1934 |
| SR 26 | 62.162 | 100.04 | SR 99 near Stockton | SR 88 near Pioneer | 1934 |
| SR 27 | 19.974 | 32.145 | SR 1 near Malibu | SR 118 in Chatsworth | 1934 |
| SR 28 | 10.943 | 17.611 | SR 89 in Tahoe City | SR 28 in Kings Beach | 1934 |
| SR 29 | 105.648 | 170.024 | I-80 in Vallejo | SR 20 in Upper Lake | 1934 |
| SR 32 | 74.387 | 119.714 | I-5 in Orland | SR 36 / SR 89 near Chester | 1934 |
| SR 33 | 289.699 | 466.225 | US 101 in Ventura | I-5 near Tracy | 1934 |
| SR 34 | 13.368 | 21.514 | Rice Avenue in Oxnard | SR 118 in Somis | 1934 |
| SR 35 | 54.056 | 86.995 | SR 17 near Redwood Estates | SR 1 in San Francisco | 1964 |
| SR 36 | 248.856 | 400.495 | US 101 near Fortuna | US 395 near Susanville | 1934 |
| SR 37 | 21.494 | 34.591 | US 101 in Novato | I-80 in Vallejo | 1934 |
| SR 38 | 59 | 95 | I-10 in Redlands | SR 18 near Big Bear Lake | 1934 |
| SR 39 | 50.017 | 80.495 | SR 1 in Huntington Beach | SR 2 in the Angeles National Forest | 1934 |
| SR 41 | 185.594 | 298.685 | SR 1 in Morro Bay | SR 140 in Yosemite National Park | 1934 |
| SR 43 | 98 | 158 | SR 119 near Taft | SR 99 in Selma | 1934 |
| SR 44 | 107.02 | 172.23 | SR 273 / SR 299 in Redding | SR 36 near Susanville | 1935 |
| SR 45 | 70 | 110 | SR 113 in Knights Landing | SR 32 in Hamilton City | 1934 |
| SR 46 | 110.696 | 178.148 | SR 1 near Cambria | SR 99 in Famoso | 1964 |
| SR 47 | 3.078 | 4.954 | I-110 in San Pedro | SR 91 in Compton | 1949 |
| SR 48 | 87.3 | 140.5 | SR 14 / SR 138 at Lancaster | SR 122 at Lancaster | 1964 |
| SR 49 | 295.065 | 474.861 | SR 41 at Oakhurst | SR 70 at Vinton | 1934 |
| SR 51 | 10.7 | 17.2 | US 50 / SR 99 in Sacramento | I-80 / SR 244 in North Highlands | 1979 |
| SR 52 | 17.222 | 27.716 | I-5 in San Diego | SR 67 in Santee | 1964 |
| SR 53 | 7.45 | 11.99 | SR 29 in Lower Lake | SR 20 near Clearlake | 1934 |
| SR 54 | 14.212 | 22.872 | I-5 in National City | Chase Avenue El Cajon city limits | 1961 |
| SR 55 | 17.807 | 28.658 | Finley Avenue in Newport Beach | SR 91 in Anaheim | 1964 |
| SR 56 | 9.21 | 14.82 | I-5 in Carmel Valley, San Diego | I-15 in Rancho Penasquitos, San Diego | 1964 |
| SR 57 | 25.84 | 41.59 | I-5 / SR 22 in Santa Ana | I-210 / SR 210 in Glendora | 1964 |
| SR 58 | 241 | 388 | US 101 near Santa Margarita | I-15 near Barstow | 1964 |
| SR 59 | 33.76 | 54.33 | SR 152 near El Nido | CR J16 / CR J59 in Snelling | 1934 |
| SR 60 | 70 | 110 | I-5 / I-10 / US 101 in Los Angeles | I-10 in Beaumont | 1964 |
| SR 61 | 6.97 | 11.22 | SR 185 in San Leandro | I-880 in Oakland | 1964 |
| SR 62 | 151.438 | 243.716 | I-10 in Whitewater | SR 95 Truck in Earp | 1934 |
| SR 63 | 38.043 | 61.224 | SR 137 in Tulare | SR 180 near Squaw Valley | 1934 |
| SR 64 | 30 | 48 | SR 1 near Malibu Beach | I-5 south of San Fernando | 1964 |
| SR 65 | 94.217 | 151.628 | SR 99 near Bakersfield | SR 70 in Olivehurst | 1934 |
| SR 66 | 32.321 | 52.016 | SR 210 in La Verne | I-215 in San Bernardino | 1964 |
| SR 67 | 24.38 | 39.24 | I-8 in El Cajon | SR 78 in Ramona | 1934 |
| SR 68 | 22.02 | 35.44 | Asilomar State Beach in Pacific Grove | US 101 in Salinas | 1934 |
| SR 70 | 178.528 | 287.313 | SR 99 near Sacramento | US 395 in Hallelujah Junction | 1964 |
| SR 71 | 16 | 26 | SR 91 in Corona | I-10 / SR 57 in San Dimas | 1934 |
| SR 72 | 7.204 | 11.594 | SR 39 in La Habra | I-605 in Whittier | 1964 |
| SR 73 | 17.764 | 28.588 | I-5 in Mission Viejo | I-405 in Costa Mesa | 1964 |
| SR 74 | 111.471 | 179.395 | I-5 in San Juan Capistrano | Southern city limit of Palm Desert | 1934 |
| SR 75 | 13.306 | 21.414 | I-5 near San Ysidro | I-5 in San Diego | 1924 |
| SR 76 | 52.63 | 84.7 | I-5 in Oceanside | SR 79 near Lake Henshaw | 1964 |
| SR 77 | 0.353 | 0.568 | I-880 in Oakland | SR 185 in Oakland | 1964 |
| SR 78 | 215.39 | 346.64 | I-5 in Oceanside | I-10 near Blythe | 1934 |
| SR 79 | 106.731 | 171.767 | I-8 near Descanso | I-10 in Beaumont | 1934 |
| SR 81 | 31 | 50 | I-215 near Riverside | I-15 near Devore | 1964 |
| SR 82 | 42.266 | 68.021 | I-880 in San Jose | I-280 in San Francisco | 1964 |
| SR 83 | 13.998 | 22.528 | SR 71 in Chino Hills | I-10 in Upland | 1964 |
| SR 84 | 96 | 154 | SR 1 at San Gregorio | West Sacramento city limit | 1934 |
| SR 85 | 24.2 | 38.9 | US 101 in San Jose | US 101 in Mountain View | 1964 |
| SR 86 | 90.67 | 145.92 | SR 111 near Calexico | I-10 in Indio | 1964 |
| SR 87 | 9 | 14 | SR 85 in San Jose | US 101 in San Jose | 1964 |
| SR 88 | 122 | 196 | SR 99 in Stockton | SR 88 near Paynesville | 1934 |
| SR 89 | 243 | 391 | US 395 near Coleville | I-5 near Mount Shasta | 1934 |
| SR 90 | 15.5 | 24.9 | SR 1 near Venice | SR 91 in Anaheim | 1964 |
| SR 91 | 59.047 | 95.027 | I-110 / Vermont Avenue in Gardena | I-215 / SR 60 in Riverside | 1964 |
| SR 92 | 27.769 | 44.69 | SR 1 in Half Moon Bay | SR 185 / SR 238 in Hayward | 1964 |
| SR 93 | 19 | 31 | SR 77 near Moraga | I-580 in Richmond | 1964 |
| SR 94 | 63.324 | 101.91 | I-5 in San Diego | I-8 near Boulevard | 1934 |
| SR 96 | 146.519 | 235.799 | SR 299 in Willow Creek | I-5 near Yreka | 1934 |
| SR 98 | 56.858 | 91.504 | I-8 near Ocotillo | I-8 east of Holtville | 1934 |
| SR 99 | 424.85 | 683.73 | I-5 near Wheeler Ridge | SR 36 near Red Bluff | 1964 |
| SR 100 | 5 | 8 | SR 1 / SR 17 near Santa Cruz | SR 1 near Santa Cruz | 1964 |
| SR 102 | 37.5 | 60.4 | I-5 near Elkhorn | I-80 near Auburn | 1964 |
| SR 103 | 1.6 | 2.6 | SR 47 near Terminal Island | SR 1 near Long Beach | 1984 |
| SR 104 | 36.04 | 58 | SR 99 near Galt | SR 49 in Sutter Creek | 1934 |
| SR 107 | 4.801 | 7.726 | SR 1 in Torrance | Lawndale city limits | 1938 |
| SR 108 | 120 | 190 | SR 99 / SR 132 in Modesto | US 395 near Bridgeport | 1934 |
| SR 109 | 1.87 | 3.009 | US 101 in East Palo Alto | SR 84 in Menlo Park | 1984 |
| SR 110 | 11.9 | 19.2 | I-10 / I-110 in Los Angeles | Glenarm Street in Pasadena | 1981 |
| SR 111 | 130.175 | 209.496 | East First Street along Mexican border in Calexico | I-10 near Whitewater | 1934 |
| SR 112 | 1.9 | 3.1 | Doolittle Drive in San Leandro | SR 185 in San Leandro | 1964 |
| SR 113 | 59 | 95 | SR 12 near Rio Vista | SR 99 near Yuba City | 1934 |
| SR 114 | 0.926 | 1.49 | US 101 in East Palo Alto | SR 84 in Menlo Park | 1964 |
| SR 115 | 35.24 | 56.71 | I-8 near Holtville | SR 111 in Calipatria | 1934 |
| SR 116 | 46.5 | 74.8 | SR 1 near Jenner | SR 121 near Sonoma | 1964 |
| SR 118 | 47.605 | 76.613 | SR 126 in Ventura | I-210 near San Fernando | 1934 |
| SR 119 | 29.783 | 47.931 | SR 33 in Taft | SR 99 near Bakersfield | 1964 |
| SR 120 | 153 | 246 | I-5 near Manteca | US 6 in Benton | 1934 |
| SR 121 | 33.57 | 54.03 | SR 37 at Sears Point | SR 128 near Lake Berryessa | 1934 |
| SR 122 | 35.27 | 56.76 | SR 14 near Palmdale | SR 58 near Barstow | 1964 |
| SR 123 | 7.375 | 11.869 | I-580 in Oakland | I-80 in Richmond | 1934 |
| SR 124 | 10.33 | 16.62 | SR 88 near Ione | SR 16 near Drytown | 1934 |
| SR 125 | 23.839 | 38.365 | Otay Mesa Road in Otay Mesa | SR 52 in Santee | 1964 |
| SR 126 | 47.167 | 75.908 | US 101 in Ventura | I-5 in Santa Clarita | 1934 |
| SR 127 | 91.033 | 146.503 | I-15 in Baker | SR 373 north of Death Valley Junction | 1933 |
| SR 128 | 120.52 | 193.96 | SR 1 near Albion | I-505 in Winters | 1934 |
| SR 129 | 14.095 | 22.684 | SR 1 near Watsonville | US 101 near San Juan Bautista | 1964 |
| SR 130 | 22.503 | 36.215 | San Jose city limit | San Antonio Valley Road on Mount Hamilton | 1964 |
| SR 131 | 4.317 | 6.948 | US 101 in Strawberry | Main Street in Tiburon | 1934 |
| SR 132 | 76 | 122 | I-580 near Tracy | SR 49 in Coulterville | 1934 |
| SR 133 | 13.635 | 21.943 | SR 1 in Laguna Beach | SR 241 near Irvine | 1964 |
| SR 134 | 16 | 25.7 | US 101 / SR 170 in Toluca Lake | I-210 / SR 710 in Pasadena | 1964 |
| SR 135 | 21 | 34 | US 101 in Los Alamos | US 101 / SR 166 in Santa Maria | 1934 |
| SR 136 | 18 | 29 | US 395 in Lone Pine | SR 190 near Keeler | 1934 |
| SR 137 | 29 | 47 | SR 43 near Corcoran | SR 65 near Lindsay | 1934 |
| SR 138 | 105.376 | 169.586 | I-5 near Gorman | SR 18 near Crestline | 1934 |
| SR 139 | 143.26 | 230.55 | SR 36 in Susanville | SR 161 / OR 39 in Hatfield | 1946 |
| SR 140 | 101.645 | 163.582 | I-5 near Gustine | Yosemite National Park | 1934 |
| SR 142 | 11.467 | 18.454 | SR 90 in Brea | SR 71 in Chino Hills | 1964 |
| SR 143 | 21 | 34 | SR 99 near Elk Grove | SR 244 near Carmichael | 1964 |
| SR 144 | 1.95 | 3.14 | Alameda Padre Serra in Santa Barbara | SR 192 in Santa Barbara | 1934 |
| SR 145 | 67 | 108 | I-5 / SR 33 near Coalinga | SR 41 near Friant | 1934 |
| SR 146 | 12.632 | 20.329 | US 101 near Soledad | SR 25 near Paicines | 1934 |
| SR 147 | 11.681 | 18.799 | SR 89 at Canyondam | SR 36 near Westwood | 1934 |
| SR 148 | 14 | 23 | I-5 near Sacramento | SR 65 near Sloughhouse | 1964 |
| SR 149 | 4.623 | 7.44 | SR 70 near Oroville | SR 99 near Chico | 1964 |
| SR 150 | 36.427 | 58.624 | US 101 in Carpinteria | SR 126 in Santa Paula | 1964 |
| SR 151 | 6.925 | 11.145 | Shasta Dam | I-5 in Shasta Lake | 1934 |
| SR 152 | 104.419 | 168.046 | SR 1 in Watsonville | SR 99 near Chowchilla | 1934 |
| SR 153 | 0.55 | 0.89 | James W. Marshall Monument in Marshall Gold Discovery State Historic Park | SR 49 in Coloma | 1934 |
| SR 154 | 32.3 | 52 | US 101 near Los Olivos | US 101 in Santa Barbara | 1964 |
| SR 155 | 74.79 | 120.36 | SR 99 in Delano | SR 178 near Lake Isabella | 1964 |
| SR 156 | 26 | 42 | SR 1 near Castroville | SR 152 near Hollister | 1964 |
| SR 158 | 15.828 | 25.473 | US 395 at June Lake Junction | US 395 south of Lee Vining | 1964 |
| SR 160 | 49.651 | 79.906 | SR 4 in Antioch | BL 80 in Sacramento | 1964 |
| SR 161 | 19.36 | 31.16 | US 97 near Dorris | SR 139 / OR 39 in Hatfield | 1964 |
| SR 162 | 93.25 | 150.07 | US 101 in Longvale | Foreman Creek Road in Brush Creek | 1964 |
| SR 163 | 11.088 | 17.844 | A Street & Ash Street in San Diego | I-15 in San Diego | 1972 |
| SR 164 | 9.56 | 15.39 | Gallatin Road in Pico Rivera | Foothill Road in Pasadena | 1964 |
| SR 165 | 38.27 | 61.59 | I-5 near Los Banos | SR 99 in Turlock | 1970 |
| SR 166 | 95.886 | 154.314 | SR 1 in Guadalupe | SR 99 in Mettler | 1964 |
| SR 167 | 21.331 | 34.329 | US 395 in Mono City | SR 359 east of Mono City | 1964 |
| SR 168 | 124 | 200 | SR 41 / SR 180 in Fresno | SR 266 in Oasis | 1934 |
| SR 169 | 23.867 | 38.41 | US 101 in Klamath | SR 96 in Weitchpec | 1919 |
| SR 170 | 9.8 | 15.8 | US 101 in Los Angeles | I-5 in Los Angeles | 1964 |
| SR 172 | 8.917 | 14.351 | SR 36 in Mineral | SR 36 / SR 89 east of Mineral | 1964 |
| SR 173 | 24.944 | 40.143 | SR 138 in Hesperia | SR 18 near Lake Arrowhead | 1964 |
| SR 174 | 13.096 | 21.076 | I-80 in Colfax | SR 20 / SR 49 in Grass Valley | 1964 |
| SR 175 | 37.89 | 60.98 | US 101 in Hopland | SR 29 in Middletown | 1964 |
| SR 177 | 27.024 | 43.491 | I-10 near Desert Center | SR 62 near Rice | 1972 |
| SR 178 | 167 | 269 | SR 58 / SR 99 in Bakersfield | SR 372 near Pahrump | 1934 |
| SR 179 | 13.8 | 22.2 | I-80 near Vacaville | SR 128 near Lake Berryessa | 1964 |
| SR 180 | 112.31 | 180.75 | SR 33 in Mendota | General Grant Grove | 1934 |
| SR 181 | 9.5 | 15.3 | SR 116 near Forestville | US 101 near Santa Rosa | 1964 |
| SR 182 | 12.645 | 20.35 | US 395 in Bridgeport | SR 338 north of Bridgeport | 1964 |
| SR 183 | 10.969 | 17.653 | US 101 in Salinas | SR 1 in Castroville | 1933 |
| SR 184 | 14.139 | 22.755 | SR 223 near Arvin | SR 178 in Bakersfield | 1964 |
| SR 185 | 10.826 | 17.423 | SR 92 / SR 238 in Hayward | I-880 in Oakland | 1964 |
| SR 186 | 2.07 | 3.33 | Mexican border near Los Algodones | I-8 near Winterhaven | 1972 |
| SR 187 | 5.405 | 8.699 | SR 1 in Venice | I-10 near Culver City | 1964 |
| SR 188 | 1.85 | 2.98 | Mexican border in Tecate | SR 94 near Potrero | 1972 |
| SR 189 | 5.565 | 8.956 | SR 18 near Crestline | SR 173 in Lake Arrowhead | 1964 |
| SR 190 | 187.59 | 301.9 | SR 99 at Tipton | SR 127 at Death Valley Junction | 1964 |
| SR 191 | 11.387 | 18.326 | SR 70 near Oroville | Pearson Road in Paradise | 1964 |
| SR 192 | 21.043 | 33.865 | SR 154 near Santa Barbara | SR 150 near Carpinteria | 1964 |
| SR 193 | 37 | 60 | Lincoln city limit | SR 49 in Placerville | 1964 |
| SR 197 | 6.725 | 10.823 | US 199 near Hiouchi | US 101 near Fort Dick | 1964 |
| SR 198 | 141.273 | 227.357 | US 101 near San Lucas | Sequoia National Park | 1964 |
| SR 200 | 2.681 | 4.315 | US 101 near McKinleyville | SR 299 near Blue Lake | 1964 |
| SR 201 | 25.3 | 40.7 | SR 99 in Kingsburg | SR 245 north of Woodlake | 1933 |
| SR 202 | 10.53 | 16.95 | California Correctional Institution | SR 58 near Tehachapi | 1964 |
| SR 203 | 8.67 | 13.95 | Minaret Summit | US 395 near Mammoth Lakes | 1964 |
| SR 204 | 6.76 | 10.88 | SR 58 in Bakersfield | SR 99 near Oildale | 1964 |
| SR 207 | 1.36 | 2.19 | SR 4 near Bear Valley | Bear Valley | 1979 |
| SR 210 | 40.41 | 65.03 | I-210 / SR 57 in Glendora | I-10 in Redlands | 2007 |
| SR 211 | 5.395 | 8.682 | Ocean Avenue in Ferndale | US 101 in Fernbridge | 1984 |
| SR 213 | 7.984 | 12.849 | 25th Street in San Pedro | Carson Street in Torrance | 1964 |
| SR 216 | 18.275 | 29.411 | SR 198 in Visalia | SR 198 near Woodlake | 1964 |
| SR 217 | 2.525 | 4.064 | UC Santa Barbara | US 101 in Goleta | 1964 |
| SR 218 | 2.85 | 4.59 | SR 1 in Seaside | SR 68 in Del Rey Oaks | 1964 |
| SR 219 | 4.7 | 7.6 | SR 99 in Salida | SR 108 near Modesto | 1964 |
| SR 220 | 6 | 9.7 | SR 84 near Rio Vista | SR 160 near Walnut Grove | 1964 |
| SR 221 | 2.682 | 4.316 | SR 12 / SR 29 near Vallejo | SR 121 in Napa | 1964 |
| SR 222 | 1.626 | 2.617 | US 101 in Ukiah | East Side Road in Talmage | 1964 |
| SR 223 | 31.92 | 51.37 | I-5 near Taft | SR 58 near Arvin | 1964 |
| SR 227 | 15.612 | 25.125 | US 101 in Arroyo Grande | US 101 in San Luis Obispo | 1964 |
| SR 229 | 9.16 | 14.74 | SR 58 near Atascadero | SR 41 near Creston | 1964 |
| SR 230 | 5.74 | 9.24 | US 101 in San Francisco | I-280 in San Francisco | 1964 |
| SR 232 | 4.11 | 6.61 | US 101 in Oxnard | SR 118 near Saticoy | 1964 |
| SR 233 | 3.882 | 6.247 | SR 152 near Chowchilla | SR 99 near Chowchilla | 1964 |
| SR 234 | - | - | I-5 in French Camp | SR 99 east of French Camp | 1964 |
| SR 235 | - | - | I-5 north of Stockton | SR 99 north of Stockton | 1964 |
| SR 236 | 17.721 | 28.519 | SR 9 in Boulder Creek | SR 9 north of Boulder Creek | 1964 |
| SR 237 | 11 | 18 | SR 82 in Mountain View | I-680 in Milpitas | 1964 |
| SR 238 | 14.393 | 23.163 | I-680 in Fremont | I-238 / I-580 in Castro Valley | 1964 |
| SR 239 | - | - | I-580 west of Tracy | SR 4 near Brentwood | 1964 |
| SR 241 | 24.534 | 39.484 | Oso Parkway near Rancho Santa Margarita | SR 91 in Anaheim / Yorba Linda | 1988 |
| SR 242 | 3.398 | 5.469 | I-680 at the Pleasant Hill-Concord line | SR 4 north of Concord | 1964 |
| SR 243 | 29.625 | 47.677 | SR 74 near Mountain Center | I-10 in Banning | 1970 |
| SR 244 | 1.08 | 1.74 | I-80 in North Highlands | Auburn Boulevard in Sacramento | 1964 |
| SR 245 | 42 | 68 | SR 198 near Exeter | SR 180 near Dunlap | 1972 |
| SR 246 | 26 | 42 | Lompoc western city limit | SR 154 in Santa Ynez | 1964 |
| SR 247 | 78.084 | 125.664 | SR 62 in Yucca Valley | I-15 in Barstow | 1964 |
| SR 249 | - | - | SR 2 north of La Cañada | SR 14 south of Palmdale | 1964 |
| SR 251 | 20.11 | 32.36 | State Route 1 near Point Reyes Station | I-580 near Point San Quentin | 1964 |
| SR 253 | 17.18 | 27.65 | SR 128 in Boonville | US 101 in Ukiah | 1964 |
| SR 254 | 31.595 | 50.847 | US 101 near Phillipsville | US 101 near Stafford | 1964 |
| SR 255 | 8.789 | 14.145 | US 101 in Eureka | US 101 in Arcata | 1964 |
| SR 257 | - | - | SR 34 | US 101 near Ventura | 1965 |
| SR 258 | - | - | I-405 near Torrance | US 101 near Hollywood | 1965 |
| SR 259 | 1.48 | 2.38 | I-215 in San Bernardino | SR 210 in San Bernardino | 1965 |
| SR 260 | 1.924 | 3.096 | Webster Street / Atlantic Avenue in Alameda | I-880 in Oakland | 1965 |
| SR 261 | 6.12 | 9.85 | Walnut Avenue in Irvine | SR 241 near Orange | 1991 |
| SR 262 | 1.07 | 1.72 | I-880 in Fremont | I-680 in Fremont | 1965 |
| SR 263 | 8.125 | 13.076 | SR 3 in Yreka | SR 96 north of Yreka | 1965 |
| SR 265 | 0.527 | 0.848 | US 97 in Weed | I-5 in Weed | 1965 |
| SR 266 | 11.721 | 18.863 | SR 266 south of Oasis | SR 264 north of Oasis | 1965 |
| SR 267 | 12.69 | 20.42 | I-80 / SR 89 in Truckee | SR 28 in Kings Beach | 1965 |
| SR 269 | 30 | 48 | SR 33 in Avenal | SR 145 near Kerman | 1972 |
| SR 270 | 9.805 | 15.78 | US 395 near Bridgeport | Bodie | 1970 |
| SR 271 | 14.84 | 23.88 | US 101 in Cummings | US 101 in Cooks Valley | 1970 |
| SR 273 | 16.23 | 26.12 | I-5 in Anderson | I-5 in Redding | 1967 |
| SR 275 | 0.14 | 0.23 | West Sacramento | Sacramento | 2010 |
| SR 276 | - | - | SR 198 near Three Rivers | Oak Grove | 1965 |
| SR 280 | - | - | Interstate 80 in San Francisco | Interstate 280 & 5th Street in San Francisco | 1991 |
| SR 281 | 3 | 4.8 | Soda Bay Road at Clear Lake | SR 29 near Glenview | 1970 |
| SR 282 | 0.691 | 1.112 | Naval Air Station North Island | SR 75 in Coronado | 1967 |
| SR 283 | 0.356 | 0.573 | US 101 near Scotia | US 101 in Rio Dell | 1970 |
| SR 284 | 8.302 | 13.361 | SR 70 in Chilcoot | Frenchman Lake | 1970 |
| SR 299 | 305.777 | 492.1 | US 101 in Arcata | Former NV 8A east of Cedarville | 1964 |
| SR 330 | 15.422 | 24.819 | SR 210 in San Bernardino | SR 18 in Running Springs | 1972 |
| SR 371 | 20.753 | 33.399 | SR 79 in Aguanga | SR 74 near Anza | 1974 |
| SR 380 | - | - | Interstate 80 in San Francisco | Interstate 280 and 5th Street in San Francisco | 1969 |
| SR 710 | 1.77 | 2.85 | California Boulevard in Pasadena | I-210 / SR 134 in Pasadena | 1984 |
| SR 905 | 8.964 | 14.426 | I-5 in San Diego | Mexican border in San Diego | 1986 |
Special Routes
| Number | Length in mi | Length in km | Southern or Western Terminus | Northern or Eastern Terminus | Formed |
|---|
| SR 5S | 0.594 | 0.956 | I-5 in Los Angeles | Colorado Street in Glendale | 1954 |
| SR 5S | 3.059 | 4.923 | I-5 in Los Angeles | I-5 in Los Angeles | 1954 |
| SR 8U | 0.17 | 0.27 | Arizona state line near the Colorado River | I-8 in Winterhaven | 1964 |
| SR 10S | 11.645 | 18.741 | Alameda Street in Los Angeles | Santa Anita Avenue in El Monte | 1973 |
| SR 14U | 3.4 | 5.5 | Newhall Avenue in Newhall | Whispering Leaves Drive in Newhall | 1964 |
| SR 15S | 18.97 | 30.53 | I-15/SR 163 interchange in San Diego | I-15 near Escondido Creek in San Diego | 1988 |
| SR 58U | 6.876 | 11.066 | Old Highway 58 near Boron | Twenty Mule Team Road near Kramer Junction | 2020 |
| SR 86S | - | - | SR 86 in Oasis | I-10 in Indio | 1964 |
| SR 101U | 1.421 | 2.287 | North Main Street at Willits city limits | north end of Redwood Highway near DeCamp | 2016 |
| SR 156U | 6.9 | 11.1 | SR 156 near Hollister | SR 156 near Hollister | 1964 |
| SR 178S | 0.397 | 0.639 | SR 178 in Bakersfield | SR 204 in Bakersfield | 1975 |
| SR 180S | 12.8 | 20.6 | SR 180 in Fresno | SR 180 in Fresno | 1964 |
| SR 210U | 5.394 | 8.681 | Juniper Avenue in Fontana | Southern Pacific railroad bridge in San Bernardino | 2007 |
| SR 880S | 1.463 | 2.354 | I-80 in Oakland | I-880 in Oakland | 1997 |
