The Palm Canyon Epic is one of the rides you guys kept saying I had to check out. We took the Palm Canyon trail and then climbed the wash up to Hahn Buena Vista to finish out the day. We self-shuttled with two cars and had an awesome time.
Trailforks and MTB Project both list trails that are no longer legal for mountain bikes. There is clear signage along the route that will divert you from the singletrack for a bit.