Great riding.
Primary access is from US Highway 101. Take the San Ardo exit and travel west onto Paris Valley Road, turn left onto Lockwood-San Ardo Road. The public lands boundary begins approximately 5 miles down the road from the Lockwood-San Ardo Road turnoff. Once at Williams Hill, the campground can be reached by turning onto road W1 and heading south.
http://www.singletracks.com/item.php?c=1&i=7480