California Association of 4 Wheel Drive Clubs, Inc.
- Non-profit organization promoting the advancement of vehicle-oriented outdoor recreation. Information about events and land use issues.
- http://www.cal4wheel.com/

California Jeeper
- Promotes the sport of off-roading in Jeep vehicles and smart trail use. Find an event calendar; trail reviews, maps and tips; forums; Jeep information and history; special related sites; and contact details.
- http://www.californiajeeper.com/

California Woodies
- Photos and information about past and upcoming events.
- http://www.californiawoodies.com/