There is a staging area off of deep creek rd. with signs. as you ride into the hills you will come to a point on most of the trails where a sign states its the end of ohv riding limits. but you wont be bothered riding just about anywhere you want out there. Sorry to the hotspring lovers that hate the motorcycle riders for posting this. but its true. I have Ridden the hills for years with out any problem. I sometimes ride all the way to the river just upstream of the springs. I would avoid the springs on an ohv even tho its easy to get to, If an old angry hippie local (wannabe owner of the springs) sees you they might flip a lid. Some of the hippies think they are inforcers of the law and have the right just because they have been going for 20 years. (yet they break federal laws by smoking pot). I turn the cheek to the pot smokers and I expect them to do the same when they see me riding the hills.
If you do decide to ride an ohv in the area, be careful anywhere near the bowen ranch trail because some of the said locals like to place large objects in the middle of trails.