Blazed by uranium prospectors in the 1950s, primitive White Rim Rd encircling Island in the Sky is the top choice for 4WD and mountain-biking trips. This 70-mile route is accessed near the Island in the Sky Visitor Center via steeply descending Shafer Trail Rd. It generally takes two to three days in a vehicle or three to four days by bike.
Since the route lacks any water sources, cyclists should team up with a 4WD support vehicle or travel with a Moab outfitter.
Permits are required and rangers do patrol. A Naturalist's Guide to the White Rim Trail, by David Williams and Damian Fagon, is a good resource.
