California State Route 18 is a state highway located in Southern California. It runs approximately 66 miles, connecting the cities of San Bernardino and Big Bear Lake. The route is known for its scenic views, especially as it climbs into the San Bernardino Mountains. The highway serves as a vital link for residents and tourists traveling to Big Bear and surrounding areas. It features various landscapes, including forests and mountain vistas, making it popular for recreational activities. California State Route 18 is also part of the larger network of state highways that facilitate transportation throughout the region.