Cactus City is an unincorporated community in Riverside County, California. It lies at an elevation of 1667 feet (508 m). Cactus City is located north of Mortmar. Cactus City was founded in 1935. Cactus city contains a rest area along Interstate 10 bearing the same name. References Unincorporated communities in Riverside County, California Populated places established in 1935 Unincorporated communities in California 1935 establishments in California