From a small parking lot off of Road 359, head west through the gate to the start of the Winiger Ridge Trail. The first 1/4 mile of the trail is rather eroded and braided and will likely require a bit of hike-a-bike. After gaining the ridge proper continue along singletrack at the forests edge.
At the 2.6 mile mark you reach the Forest Service boundary markers and the turn around point for your ride. The Winiger Ridge Trail can be agreeably combined with the rugged and flowy county road 68J by parking at Walker Ranch.