Go N out of Durango til Hermosa. Turn left onto County/FS 201 Rd. Dirt rd. that heads west up into the hills. Follow it for about 5 mi and you'll come to a free camp ground on your left. Its got pit toilets but no running water. Great place though. We stayed there about a week. Puts you real close to The Lime Gorges and the Upper Animas. Kind of trek to the Vallecito but you can always just pay to camp there for the one night.