California county routes in zone R
There are two routes assigned to the "R" zone of the California Route Marker Program, which designates county routes in California. The "R" zone currently only includes county highways in Riverside County. A third "R" route in the county existed until 1970.
R1
County Route R1 was a county route in Riverside County, California, United States. The route was converted into a state highway as California [State Route 243|SR 243] in 1970. Its southern end was at SR 74 in Mountain Center and its northern end was in Banning.R2
County Route R2 is a county route in Riverside County, California, United States. The route is known as Kaiser Road. Its southern end is SR 177 near Desert Center, and its northern 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 road for CR R2 is named after the now defunct Kaiser Steel, which operated in Eagle Mountain. It was founded by industrialist Henry J. Kaiser, who is also best known as the founder of health maintenance organization Kaiser Permanente.
The route was defined in 1964, and has not been altered since then.
Major intersections
R3
County Route R3 is a county route in Riverside County, California, United States. The route is known as Sage Road, Cactus Valley Road, and State Street. Its southern end is SR 79 in Radec and its northern end is SR 74 / SR 79 in Hemet.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.