Castleton-Gateway Road Professional Review and Guide
"If you’re driving from Colorado to Moab, this road provides an excellent scenic alternative to I-70. The route starts at Gateway, a small settlement set in a valley on the Dolores River, and follows the well-marked John Brown Canyon just south of town on Colorado 141. Special Attractions: Spectacular canyon scenery around Gateway; Interstate trail providing alternative access to slickrock country; Far-ranging views across Beaver Creek and Fisher Valley in Utah.
High-clearance vehicles are preferred, but not necessary. This trail is dirt roads, but may have rocks, grades, water crossings, or ruts that make clearance a concern in a normal passenger vehicle. The trail is fairly wide, so that passing is possible at almost any point along the trail. Mud is not a concern under normal weather conditions."