In the California Route Marker Program, which designates county routes in California, only two highways exist in the "R" zone, which encompasses Riverside County. A third route existed until 1970.
In the California Route Marker Program, which designates county routes in California, only two highways exist in the "R" zone, which encompasses Riverside County. A third route existed until 1970.
County Road R1 | |
|---|---|
| Location | Mountain Center – Banning |
| Existed | 1966–1970 |
 | This section needs expansion. You can help by adding to it. (November 2019) |
County Route R1 was converted into SR 243 in 1970. Its southern end was at SR 74 in Mountain Center and its north end was in Banning. [1]
County Road R2 | |
|---|---|
| Location | Desert Center – Eagle Mountain |
| Length | 11.26 mi [2] (18.12 km) |
| Existed | 1964 [2] –present |
| | This section needs expansion. You can help by adding to it. (February 2010) |
County Route R2 is also known as Kaiser Road. Its southern end is SR 177 near Desert Center, and its north end is at Eagle Mountain, a modern day ghost town. Eagle Mountain is not openly accessible; its perimeters have been fenced and gated, with a site manager appointed to handle access requests.
The route was defined in 1964, and has not been altered since then.
The entire route is in Riverside County.
| Location | mi | km | Destinations | Notes | |
|---|---|---|---|---|---|
| Desert Center | 0.0 | 0.0 |  SR 177 | Southern terminus | |
| Eagle Mountain | 11.26 | 18.12 | Northern terminus of CR R2 at the southern boundary gate of Eagle Mountain; road continues as Kaiser Road inside the ghost town | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||
County Road R3 | |
|---|---|
| Location | Radec – Sage – Hemet |
| Length | 23.45 mi [2] (37.74 km) |
| Existed | 1966 or 1973 [2] –present |
| | This section needs expansion. You can help by adding to it. (February 2010) |
County Route R3 is also known by several other names along its route. Portions of the highway are called Sage Road, Cactus Valley Road, and State Street. Its southern end is SR 79 at Radec and its north end is SR 74.
At its north end in Hemet, it provides a major transportation route.
Historic information conflicts as to the date the route was defined. Some information indicates the highway was created in 1966, although other sources give a commissioning date of 1973. This is a former routing of SR 79. [2]
The entire route is in Riverside County.
| Location | mi | km | Destinations | Notes | |
|---|---|---|---|---|---|
| Radec | 0.0 | 0.0 |  SR 79 – Anza, Temecula | Southern terminus | |
| Sage | 5.1 | 8.2 | Wilson Valley Road - Aguanga | ||
| Hemet | 20.0 | 32.2 | Domenigoni Parkway - Menifee | ||
| 23.1 | 37.2 |  SR 74 (Florida Avenue) | Northern terminus | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||
State Route 91 (SR 91) is a major east–west state highway in the U.S. state of California that serves several regions of the Greater Los Angeles urban area. A freeway throughout its entire length, it officially runs from Vermont Avenue in Gardena, just west of the junction with the Harbor Freeway, east to Riverside at the junction with the Pomona and Moreno Valley freeways.
The Ventura Freeway is a freeway in southern California, United States, running from the Santa Barbara/Ventura county line to Pasadena in Los Angeles County. It is the principal east-west route through Ventura County and in the southern San Fernando Valley in Los Angeles County. From the Santa Barbara County line to its intersection with the Hollywood Freeway in the southeastern San Fernando Valley in Los Angeles, it is signed as U.S. Route 101 (US 101), which was built in the late 1950s and opened on April 5, 1960. East of the Hollywood Freeway intersection, it is signed as State Route 134 (SR 134) which was built by 1971.
Interstate 215 (I-215) is a 54.5-mile-long (87.7 km) north–south auxiliary Interstate Highway in the Inland Empire region of the San Bernardino–Riverside urban area in Southern California. It has portions designated as the Barstow, Escondido, and Armed Forces Freeways. I-215 is a bypass auxiliary route of I-15, running from Murrieta to northern San Bernardino. While I-215 connects the city centers of both Riverside and San Bernardino, its parent I-15 runs to the west through Corona and Ontario.
State Route 111 is a state highway in the U.S. state of California. It is the main north-south route and retail corridor through the Coachella Valley, a part of the Colorado Desert in the southeastern corner of the state and a famous resort destination. It also runs through the Imperial Valley, and along the eastern shore of the Salton Sea. Its southern terminus is in Calexico near the Calexico West Port of Entry on the U.S.-Mexico border, and its northern terminus is at Interstate 10 at the northwestern corner of the Palm Springs city limits, near the unincorporated community of Whitewater.
State Route 74, part of which forms the Palms to Pines Scenic Byway or Pines to Palms Highway, and the Ortega Highway, is a state highway in the U.S. state of California. It runs from Interstate 5 in San Juan Capistrano in Orange County to the city limits of Palm Desert in Riverside County. Stretching about 111 miles (179 km), it passes through several parks and National Forests between the Pacific coast and the Coachella Valley.
The State Scenic Highway System in the U.S. state of California is a list of highways, mainly state highways, that have been designated by the California Department of Transportation (Caltrans) as scenic highways. They are marked by the state flower, a California poppy, inside either a rectangle for state-maintained highways or a pentagon for county highways.
State Route 243, or the Banning-Idyllwild Panoramic Highway, is a 30-mile two-lane state highway in the U.S. state of California that runs from Banning to Idyllwild in Riverside County. The highway is a connector between Interstate 10 (I-10) and SR 74. Along its route, it provides access to the San Bernardino National Forest. A road from Banning to Idyllwild was planned around the turn of the twentieth century, and was open by 1910. The road was added to the state highway system in 1970.
State Route 78 (SR 78) is a state highway in the U.S. state of California that runs from Oceanside east to Blythe, traversing nearly the entire width of the state. Its western terminus is at Interstate 5 (I-5) in San Diego County and its eastern terminus is at I-10 in Riverside County. The route is a freeway through the heavily populated cities of northern San Diego County and a two-lane highway running through the Cuyamaca Mountains to Julian. In Imperial County, SR 78 travels through the desert near the Salton Sea and passes through the city of Brawley before turning north and passing through an area of sand dunes on the way to its terminus in Blythe.
State Route 79 is a state highway in the U.S. state of California. The route begins at Interstate 8 (I-8) in San Diego County, continuing north through the town of Cuyamaca into Julian. After passing through Warner Springs, the route crosses into Riverside County, serving the cities of Temecula and Murrieta. SR 79 ends at I-10 in Beaumont.
State Route 283 is an unsigned state highway in the U.S. state of California that is part of both US 101 Business and Wildwood Avenue through Rio Dell in Humboldt County. The SR 283 designation runs from U.S. Route 101 south of the city near Scotia to the north end of the Eel River Bridge. US 101 Bus./Wildwood Avenue then continue north through the center of Rio Dell to meet with US 101 in the northern part of the city. The route was defined in 1970 as a transfer from a realigned US 101 after a freeway bypass was built.
State Route 371 is a state highway in Riverside County in the U.S. state of California, serving as a short connector of 33 kilometres (21 mi) from SR 79 near Aguanga to SR 74 near Anza. It is a heavily-used shortcut from southwestern Riverside County to the Coachella Valley in central Riverside County via SR 74. The current route was part of SR 71 until 1973, when SR 79 and SR 71 were co-signed from Aguanga to Temecula. In 1974, the portion of SR 71 from Temecula to Corona along I-15's current alignment was deleted, and the orphaned route from Aguanga to Anza was re-signed as SR 371.
State Route 65 is a north-south state highway in the U.S. state of California. It is composed of two segments in the Central Valley. The southern segment begins at SR 99, near Bakersfield and terminates at SR 198 near Exeter. It also serves the communities of Oildale, Ducor, Terra Bella, Porterville, Strathmore, and Lindsay. The northern segment begins at Interstate 80 in Roseville and terminates at SR 70 at Olivehurst. It also serves the communities of Rocklin, Lincoln, and Wheatland.
State Route 195 was a state highway in the U.S. state of California, branching westward from SR 111 to SR 86 near the town of Mecca and the Salton Sea. The route formerly extended east to Interstate 10 (I-10) near Joshua Tree National Park as a longer route extending to Blythe and points further east. After the main route was shifted north, the older route remained as an alternate known as Box Canyon Road. The route was designated in the 1964 state highway renumbering, although the Box Canyon Road portion was removed as a state highway in 1972. Following the construction of the SR 86 expressway, SR 195 was curtailed in 2009, and removed entirely in 2014.
Interstate 10 (I-10) is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California to Jacksonville, Florida. The segment of I-10 in California runs east from Santa Monica through Los Angeles, San Bernardino, and Palm Springs before crossing into the state of Arizona. In the Greater Los Angeles area, it is known as the Santa Monica Freeway and the San Bernardino Freeway, linked by a short concurrency on I-5 at the East Los Angeles Interchange. I-10 also has parts designated as either the Rosa Parks Freeway, the Redlands Freeway, or the Christopher Columbus Transcontinental Highway. I-10 is also known colloquially as "the 10" to Southern California residents .
Route 15, consisting of the contiguous segments of State Route 15 (SR 15) and Interstate 15 (I-15), is a major north–south state highway and Interstate Highway in the U.S. state of California, connecting San Bernardino, Riverside, and San Diego Counties. The route consists of the southernmost 289.24 miles (465.49 km) of I-15, which extends north through Nevada, Arizona, Utah, Idaho, and Montana to the Canada–US border. It is a major thoroughfare for traffic between San Diego and the Inland Empire, as well as between Southern California, Las Vegas, Nevada, and the Intermountain West.
There are 28 routes assigned to the "A" zone of the California Route Marker Program, which designates county routes in California. The "A" zone includes county highways in Lassen, Plumas, Shasta, Siskiyou, and Tehama counties.
There are 9 routes assigned to the "N" zone of the California Route Marker Program, which designates county routes in California. The "N" zone includes county highways lying in Los Angeles and Orange counties.
There are 34 routes assigned to the "S" zone of the California Route Marker Program, which designates county routes in California. The "S" zone includes county highways in Imperial, Orange, Riverside, San Diego, and Santa Barbara counties.
