, There is the Blue Ridge Laser Wash about 3-miles from the Biltmore entrance. Address is 1198 Hendersonville Road, their ph.# is 277-7778. AND if you just want to spray off your car there is a 3-bay coin wash about a 1/2 mile from the Biltmore entrance, not sure of the name but if you come straight out of the Estate by McDonalds go straight across onto 25A you'll see the little bay wash on the left just a little ways out.
And if you happen to have to go to the WAL-MART off tunnel road, address 125 Bleachery Blvd, they just built a new 4-car bay coin car wash right before the WAL-Mart entrance. They are more out there that others may let you know about as well.