Description: The first 1/2 mile is fairly level, then the road begins to climb. There are some steep uphills and at the 1 1/2 mile mark there is a foot bridge, here you will need to ford the stream. The road continues to climb through spruce groves crossing a vehicle bridge and immediately becoming steeper and more rugged. Three miles up the road the Mace cabin is on the right. 1/4 mile past the cabin the road to Pearl Pass forks steeply to the left. Keep left (the right fork goes to Montezuma Basin, refer to that Forest Service information sheet for further information). The road climbs steeply, there are rough, rocky sections and you'll want to be sure that everyone is wearing a seat belt. Once over the Pass the route is not terribly demanding except for a section of marsh.
Directions: Travel 1/2 mile west on Highway 82 from Aspen to the roundabout. Go around the roundabout and turn right onto Castle Creek Road. The beginning of this route is about 2 miles beyond Ashcroft.