California State Route 138 is a state highway located in southern California. It runs approximately 100 miles, connecting the cities of Gorman and Crestline. The route traverses diverse landscapes, including mountains and desert areas, making it a scenic drive for travelers. The highway serves as an important connector between various communities and recreational areas, including Lake Arrowhead and Big Bear Lake. It also provides access to several state parks and natural attractions, enhancing its significance for both residents and visitors exploring the region's outdoor activities.