Behind the Rocks is a wonderful area of massive sandstone fins -- 100-500 feet tall, 50-200 feet thick and up to 1/2 mile long. There are no established trails within the area, you just choose your own route through the maze of narrow corridors created by the fins, an often fascinating experience. It is very easy to get lost, however, so you'll need a compass and some skill. (Remember that the fins are all oriented east to west.) The area is currently under consideration for wilderness designation and you will find plenty of solitude here. Access is gained from the Moab Rim Road, Hidden Valley Trail or Pritchett Canyon Trail.