Brown marker with numbers = open route
Red or no Marker = no motorized vehicles permitted
You can legally drive a quad to the trail head for 3W02 and then hike on in about 1.2 miles. Chain it to the USFS sign
Contrary to the wild rumors being spread by Dan Clark, the locals are friendly and do not shoot at OHV users. If you wish, pay the $5 and park at the Bowen Ranch where you can cable your bike to a Juniper tree. The hike from the Bowen Ranch is a little further, about 2 miles.
Good luck and enjoy!