The Robbers Roost is about 64 miles one way and should take you about 7-8 hours round trip. This trip is often combined with a visit to the Great Gallery Pictographs in Horseshoe Canyon which is part of Canyonlands NP and that would ad 2-3 hours to your trip. Parking is available at the City Park on N200E and Main Street in Green River. The road is a well mainrtained gravel road occasionaly making wash crossings. We rode the trail in a Stock 4 door Polaris ranger. There are no extreme obstacles. There are no width restrictions.