0.0 From the parking lot, ride across the cattle guard and start uphill.
2.2 CR 101A turns left. Stay on CR 101 which continues straight and uphill. Bear Creek runs by the side of the road.
2.5 Cross the creek and reach the top of the climb at the trailhead. Look for the Rainbow Trail sign and ride left (east) following the sign that reads “Howard Creek 3”.
4.1 The well-signed trail cuts downhill to the right. Huge views of the Sangre de Cristo Peaks and Bighorn Sheep Canyon.
5.3 The trail passes through private land. Stay on the trail.
5.9 Cross Howard Creek and ride toward West Creek.
6.7 Cross another creek and pass Porter Gulch. Stay on the Rainbow Trail singletrack which heads up, traversing the hillside.
8.3 A big righthand corner on the ridge top. Follow the singletrack and the sign pointing to West Creek. Don’t take the road downhill. This road heads downhill to US 50, but has been gated and marked “No Trespassing” by the landowner.
9.1 Cross West Creek. There is a makeshift log bridge about 10 yards upstream so you can stay dry. Just after West Creek a long rocky technical downhill will get your attention.
10.0 Cross the East Fork of West Creek. The trail goes up the middle of the creek for a few yards and steeply up the other side.
12.0 Cross another small creek after another fast downhill section.
12.6 Cross Cherry Creek.
13.3 As you top a red-colored ridge, stay on the obvious singletrack heading downhill.
13.6 Cross another small creek.
14.0 Turn left off the Rainbow Trail downhill on the well-marked trail to the Kerr Gulch Trailhead. It’s fast and loose.
14.6 Enter the open Kerr Gulch Trailhead. Ride directly downhill through the meadow/parking area and look for the dirt road. Follow the road to the right and ride downhill. This dirt road is scary fast. Watch for bears, seriously.
15.4 Ride straight through the unmarked crossroads. Go the same direction you were before the intersection.
15.8 Stay on the main downhill.
19.8 T-intersection with US 50. Nice ride!