Originally Posted by JimmyTheHog
This ride has been posted before, so I'll skimp on the details - get to New Idria and go over Clear Creek - nice dirt road climb and decent, then right on Los Gatos/Coalinga rd, then right on Old Hernandez Rd - part paved/part dirt, including a nice creek crossing, then right onto hwy 25 for a few miles, then left on La Gloria rd (easy to miss this one) - about 10 miles of dirt, eventually turning paved and comes out at hwy 101 in Gonzales.
I know this is an old thread, but it was resurrected so should be updated: Clear Creek Management Area (BLM) is closed to everything - including hikers. You cannot get from New Idria to Los Gatos Creek Road/Coalinga anymore. Don't get caught there; its tresspassing on Fed Property.
Mendocino NF is the biggest off-road area in the region now. For a quick fix you can try OHV parks: Carnagie south of Livermore, Hollister Hills south of Hollister, and Metcalf in South San Jose.