California county routes in zone R

County routes in California were first established in the late 1950s as a way to provide better connectivity between rural areas and the state's extensive highway system. The routes are maintained by individual counties but are designated and numbered according to a statewide system. The "R" zone is one of several zones within the California county route system, with each zone typically assigned a letter followed by a number.

California State Route 1 (SR 1), also known as the Pacific Coast Highway (PCH), Cabrillo Highway, and Shoreline Highway for its designated sections, is a major north-south state highway that runs along most of the Pacific coastline of the U.S. State of California. It is the longest state route in California, stretching 656 miles (1,056 km) from its southern terminus at Interstate 5 (I-5) near Dana Point in Orange County to its northern terminus at U.S. Route 101 (US 101) near Leggett in Mendocino County.[1]

The history of SR 1 dates back to the World War I, when California highways were referred to by either a highway name or a route number. The route numbers were used by state highway planners and the California legislature from 1915 until 1964 but were never posted on highways or used on maps. The SR 1 designation was first assigned in 1939.

One of the earliest segments to be incorporated into SR 1 was Route 56 along the Big Sur coast, which was incorporated into the state highway system and re-designated as SR 1 in 1939. This section of the route was then declared the first State Scenic Highway in 1965, and in 1966, Lyndon B. Johnson—the first lady—led the official designation ceremony at Bixby Bridge. SR 1 has been progressively developed in various stages, with the first section being Route 56. However, portions of the route had several names and numbers over the years as more segments opened. It was not until the 1964 state highway renumbering that the entire route was officially designated as SR 1.

Since its construction, SR 1 has become famous worldwide for its scenic beauty and has been designated as an All-American Road. The highway has been reconstructed many times, with most of the damage being due to landslides and erosion caused by winter storms.

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.

Major intersections

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 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]

Major intersections

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

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