The California Trail Users Coalition is a non-profit corporation designed to be a forum for all trail users (hike, mountain bike, horse, wildlife & vehicle) to discuss related issues, problems and alternative solutions; to assist in the planning, development, maintenance and hosting of trails; and to help enforce the rules of the road; and to develop and maintain programs designed to educate users on proper use of trails and trail etiquette.
Avenza Maps, offers apps and digital maps. Below are all the CTUC maps available for California.
CTUC: California Trail Users Coalition Maps
OHV, SVRA, BLM, 4×4, ATV, UTE, SUV
many desert locations, and some mountains
listed from north to south