Have they changed the laws against motorized vehicles in/above Wilderness areas?
This road and the spurs associated with it are along a corridor through the Wilderness areas, the Selway-Bitterroot to the north, and the Frank Church-River of No Return Wilderness to the Souuth. Technically, the road corridor itself is not woilderness so you can raide your car, or do an ATV along this rout.
It is a fairly polular ATV route as I understand though we did not see any at all on our trip. All we saw after the Granite Springs campground were three vehicles in about 70 miles. We drove our 2005 Chevy Silverado 4X4 Pickup with the Z71 off road package.