This is the original doubletrack ride from the highway to the edge of Arches National Park (followed by a hike to the overlook). The Klondike Bluffs Trail is a modest climb, but isn't too technically difficult. It's a good trail for someone who's in good shape, but is inexperienced in mountain biking. It makes an excellent first "slickrock adventure." Round trip, it's 9.6 miles on the bike and 1 mile on foot (bikes aren't allowed off-road in Arches National Park, so you hike the last half mile).
The trail climbs 800 feet in four miles. Give yourself about three hours, including sightseeing.
Just before the end of the trail, the abandoned Brontosaur copper mine can be reached via a short spur. It's worth a look. (Watch for a spur on the right as you head east uphill and are approaching the badland hills.)
One-page printable riding guide
GPS Track Files:
Baby Steps Loop
Baby to Klondike
GPX multi-track file of all Klondike area trails
Topo map of this trail:
Area map, including Baby Steps: View Klondike area
Lodging, camping, shops: Links to Moab area resources