We rode Rayhouse from the west end (Berryessa-Knoxville) to east (Highway 16) on Saturday. Both ends are closed. The west end is easy to skirt by either climbing the embankment by the gate or going through the bushes, which could be done, with a bit of care, even on a ginormous beast.
The east end is also closed but no problem at all to get through. Watch out for that zero ton weight limit bridge, though! Yeah, right...but if you're worried, you can cross in the creek easily enough!
The views were spectacular and we encountered no other vehicles nor enforcement officials. The road is in pretty bad shape on the west end with several washouts but would not be a problem even for most 2WD cars and very easy on the bikes. The rest of the road is smooth and easy with a few minor rockfalls, no challenge at all. Seems like a must-do ride if you're in the area just for the scenery. Slightly off topic, has anyone visited the Knoxville OHV area?
The first pic is the west end of Rayhouse, the last pic is the Highway 16 end.