ORV use is only allowed on BLM lands that are marked as designated for such use. Details here. ORV use on private property only if you have the explicit permission of the owner.
This brochure (updated June 2007) was produced by the BLM, the Sheriff's department and the police departments of Twentynine Palms and Yucca Valley. It includes a map of legal ORV riding areas and designated routes in the Morongo Basin (all other areas are off-limits to ORVs), information on safe & responsible riding, riding restrictions, a summary of the SB County Ordinance and important phone numbers.
If you have a problem downloading the brochure or would like copies of it contact Sgt. Rick Collins at the Yucca Valley Sheriff's Department (760) 365-9413.