State Route 299 is an east–west state highway in the state of California that runs across the northern part of the state. At 305.777 miles (492.100 km), it is the third longest California state highway. Route 299 begins at US 101 at the northern edge of Arcata and continues in an easterly direction through to the Nevada state line. Between Arcata and Redding, Route 299 intersects with State Route 96, and is briefly co-signed with State Route 3. In Redding, it intersects with State Route 273, State Route 44, and Interstate 5. East of Redding, it intersects with State Route 89, and a section is co-signed with State Route 139 before reaching Alturas. It is then co-signed with U.S. Route 395 northeast of Alturas, and then runs east toward the border with Nevada. A ghost town, Vya, Nevada, can be reached via this route, which after the border becomes a dirt road, which was formerly Nevada State Route 8A.
State Route 16 is a state highway in the northern region of the U.S. state of California that runs from Route 20 in Colusa County to Route 49 just outside Plymouth in Amador County, primarily crossing the Sacramento Valley. Much of the route through the Sacramento area is unsigned as it runs on a concurrency with the I-5 and US 50 freeways.
State Route 59 is a state highway in the U.S. state of California located entirely in Merced County. It connects State Route 152 near El Nido to the city of Merced and beyond, ending abruptly at the intersection of County Routes J59 and J16 in Snelling.
State Route 88, also known as the Carson Pass Highway, is a state highway in the U.S. state of California. It travels in an east–west direction from Stockton in the San Joaquin Valley, crossing the Sierra Nevada at Carson Pass, and ending at the Nevada state line, whereupon it becomes Nevada State Route 88, eventually terminating at U.S. Route 395.
State Route 96 is a state highway in the U.S. state of California that follows the Trinity and Klamath Rivers between State Route 299 in Willow Creek and Interstate 5 near Yreka in Northern California. For most of the route it goes through the Karuk Tribal Reservation, the Yurok Tribal Reservation, and the Hoopa Tribal Reservation. Over half of the length is the Bigfoot Scenic Byway, passing through "the region boasting the most sightings of Bigfoot of anywhere in the country" according to the National Forest Scenic Byway Program.
State Route 183 is a state highway in the U.S. state of California, entirely in Monterey County, running from U.S. Route 101 in Salinas to State Route 1 in Castroville.
State Route 26 is a state highway in the U.S. state of California, running from State Route 99 in Stockton in San Joaquin County to State Route 88 near Pioneer in Amador County. The highway is routed to serve Mokelumne Hill and West Point in Calaveras County.
State Route 32 is an east–west state highway in the U.S. State of California which is routed from Interstate 5 in Orland, across the Sacramento Valley and through Chico, through the northern Sierra Nevada, and ending at SR 36 and SR 89 in eastern Tehama County.
State Route 45 is a state highway in the U.S. State of California that travels in a north–south direction in the Sacramento Valley from Route 113 in Knights Landing to Route 32 in Hamilton City.
State Route 63 is a north–south state highway in the U.S. state of California in the Central Valley. It begins from near Tulare at Route 137, runs north through the city of Visalia and the towns of Cutler and Orosi, before ending 8 miles (13 km) north of Orange Cove, where it reaches its northern terminus at Route 180, roughly 2 and 1/2 miles southwest of the town of Squaw Valley. State Route 63 runs concurrent with Route 198 within Visalia.
State Route 104 is a west–east state highway in the U.S. state of California that runs from the Central Valley to the Sierra Foothills. It connects State Route 99 near Galt to State Route 49 in Sutter Creek via the city of Ione. It is known as Twin Cities Road from its western terminus up until just before Ione. West of the SR 104/SR 99 interchange, Twin Cities Road continues to Interstate 5 and then eventually end at State Route 160 north of Walnut Grove.
State Route 121 is a state highway in the U.S. state of California. It runs through the Wine Country region of Sonoma and Napa counties. Its southern terminus is at State Route 37 at Sears Point, and its northern terminus is at State Route 128 near Lake Berryessa. SR 121 passes through the Carneros region of the southern Sonoma Valley and Napa Valley.
State Route 127 is a state highway in the U.S. state of California that connects Interstate 15 in Baker to Nevada State Route 373 at the Nevada state line, passing near the eastern boundary of Death Valley National Park. The entire length of the highway closely follows the central portion of the former Tonopah and Tidewater Railroad and loosely follows the Amargosa River.
State Route 137 is a state highway in the U.S. state of California, running in the San Joaquin Valley from State Route 43 near Corcoran to State Route 65 in Cairns Corner.
State Route 236 is a state highway in the U.S. state of California. It is an approximately 18-mile (29 km) "C" shaped loop route of State Route 9 in the Santa Cruz Mountains that serves Big Basin Redwoods State Park. SR 236 begins in the community of Boulder Creek and ends at Governor's Camp in Big Basin State Park near the Waterman Gap.
State Route 158 is a state highway in the U.S. state of California. Known as the June Lake Loop, it is a loop route of U.S. Route 395 in Mono County that serves the community of June Lake.
State Route 172 is a state highway in the U.S. state of California in Tehama County. It is a loop route off of State Route 36 that serves the Mill Creek area of Lassen National Forest.
State Route 203 is a state highway in the U.S. state of California that basically serves as a spur route from U.S. Route 395 in Mono County to the town of Mammoth Lakes and Minaret Summit. Within Mammoth Lakes, State Route 203 is known as both "Minaret Road" and "Main Street." It connects to Lake Mary and the Mammoth Scenic Loop via secondary roads.
State Route 222, named Talmage Road along its entire length, is an unsigned state highway in the U.S. state of California. It was originally constructed as a short spur route of U.S. Route 101 in Mendocino County to what was Mendocino State Hospital in Talmage. The road has remained a state highway after the hospital closed down and the City of Ten Thousand Buddhas monastery was established on the former site in 1976. The SR 222 designation legislatively ends at its intersection with East Side Road, where the road continues as Bodhi Way into the monastery complex.
State Route 271 is a state highway in the U.S. state of California that runs along a former routing of U.S. Route 101 in Mendocino and Humboldt counties. It also connects with State Route 1 just before that route's terminus with US 101 in Leggett. After US 101 was realigned, SR 271 was reduced to being a frontage road in discontinuous segments. While US 101 stays mostly in second growth redwoods, SR 271 is used as a scenic alternate through several old growth redwood groves.
