State Route 116 (SR 116) is a state highway in the U.S. state of California in Sonoma County. The route runs from SR 1 on the Pacific coast near Jenner to SR 121 south of Sonoma.
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. The segment of SR 299 between Arcata and Redding is the Trinity Scenic Byway, a National Forest Scenic Byway.
State Route 25 is a state highway in the U.S. state of California between State Route 198 in Monterey County and U.S. Route 101 in Santa Clara south of Gilroy. For most of its length, SR 25 runs through the center of San Benito County.
U.S. Route 101 Business is a business loop of U.S. Route 101 that runs along Wildwood Avenue in Rio Dell in Humboldt County, California. Its southernmost section between US 101 near Scotia to the north end of the Eel River Bridge is legally defined as an unsigned state highway, State Route 283. The route was defined in 1970 as a transfer from a realigned US 101 after a freeway bypass was built.
State Route 20 is a state highway in the northern-central region of the state of California, running east–west north of Sacramento from the North Coast to the Sierra Nevada. Its west end is at SR 1 in Fort Bragg, from where it heads east past Clear Lake, Colusa, Yuba City, Marysville and Nevada City to I-80 near Emigrant Gap, where eastbound traffic can continue on other routes to Lake Tahoe or Nevada.
State Route 146 is a state highway in the U.S. state of California in Monterey and San Benito Counties. The route serves as an entryway to Pinnacles National Park, located in the Gabilan Mountains, from both U.S. Route 101 in the Salinas Valley on the west and State Route 25 near Paicines on the east. The route is broken into two sections and cannot be used to completely pass through Pinnacles National Park.
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 193 is a state highway in the U.S. state of California that runs through Placer and El Dorado counties. It begins as an east–west arterial road running from Lincoln to Newcastle, just west of Auburn. Then after concurrencies with Interstate 80 and State Route 49 through Auburn, SR 193 resumes heading eastward from Cool to Georgetown, then turning south to rejoin SR 49 just north of Placerville.
State Route 128 is a state highway in the U.S. state of California, connecting the Mendocino coast to the Sacramento Valley, through the state's Wine Country. It runs from State Route 1 near Albion to Interstate 505 in Winters.
State Route 129 is a state highway in the U.S. state of California, connecting State Route 1 in Watsonville in Santa Cruz County with U.S. Route 101 near San Juan Bautista in San Benito County.
State Route 229 is a state highway in the U.S. state of California, running in San Luis Obispo County from State Route 58 to State Route 41. It connects the small community of Creston with the rural state routes. Also, in conjunction with SR 58 and SR 41, it provides a slower, more scenic route between the Central Coast and the San Joaquin Valley.
State Route 162 is a state highway in the U.S. state of California that runs roughly west–east through the Coast Ranges and the Sacramento Valley to the western slopes of the Sierra Nevada. It begins at U.S. Route 101 near Longvale, in Mendocino County, and ends at Brush Creek, in Butte County. For most of its length, it is a two lane, undivided highway. SR 162 is not signed as a contiguous route through Mendocino National Forest in Mendocino and Glenn counties. Instead, the portion inside the national forest is federally maintained by the U.S. Forest Service as Forest Highway 7 (FH 7), and is not included in the state route logs.
State Route 211 is a state highway in the U.S. state of California that connects Ferndale with U.S. 101 in Humboldt County. The highway was originally designed to be the northernmost segment of State Route 1, but after construction of the Coast Highway through the Lost Coast region was abandoned, the route to Ferndale was renumbered to SR 211.
State Route 217 is a state highway in the U.S. state of California that serves as a spur route from U.S. Route 101 to the University of California, Santa Barbara. Although the entire route is a freeway, SR 217 is officially named Ward Memorial Boulevard in honor of California State Senator Clarence C. Ward, who represented Santa Barbara County from 1941 to 1955.
State Route 253, also known as the Ukiah–Boonville Road, is a state highway in the U.S. state of California that runs between the Anderson and Ukiah valleys in Mendocino County. It crosses the mountains of the Mendocino Range from State Route 128 near Boonville to U.S. Route 101 near Ukiah.
State Route 169 is a state highway in the U.S. state of California that is separated into two distinct segments by undeveloped areas in the Yurok Indian Reservation in Del Norte and Humboldt counties. The western segment runs from U.S. Route 101 near Klamath to Klamath Glen, while the eastern segment goes from Wautec Village to State Route 96 near Weitchpec.
State Route 175 is a state highway in the U.S. state of California that runs through the Mayacamas Mountains, connecting U.S. Route 101 in Hopland in Mendocino County with State Route 29 in Middletown in Lake County.
State Route 197 is a state highway in the U.S. state of California located north of Crescent City in Del Norte County. Running along the north bank of the Smith River as North Bank Road, SR 197 is a bypass connecting U.S. Highways 199 and 101.
State Route 200 is a state highway in the U.S. state of California near Arcata in Humboldt County. It is a cut-off connecting U.S. Route 101 and State Route 299. It runs along the north bank of the Mad River, to the north of the 101-299 junction.
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.
US 101 in Ukiah 
