Mostly dirt, first 6 miles is single trail, then the next 18 miles is dirt road with ocassionl vechiles, about three gates.
How to get there:
From Sonora take 108 up to Pinecrest. Park at Pinecrest Ranger Station. About 400feet down 108 on the left is a dirt road, goes down to a houseing district, follow paved road to a dirt road on the right. Go around the gate and start the trail to Sping Gap. Ther are other bikers on this trail. At Sping Gap go up the road about a quarter of mile and turn right on dirt road. This where you might meet a vehicle in hunting season. follow road to Lions lake. For a longer ride go on to Twain Harte from here. Makes for a 34 mile ride. About 4 miles of Hyway riding.
I have riden this trail many times. There are sometimes horses and always other bikers on this ride.