South of Steamboat Springs and west of Yampa, take County Road 17 at the north end of town to the Crosho Lake turnoff (5 miles), turn left on gravel road #15. At the fork in the road stay right; continue for 4.5 miles to Crosho Lake. Parking is available near Crosho Lake.
OPTION 1: Begin the route by heading north along the east side of Crosho Lake. This is a narrow foot trail with brush growing to the trail sometimes making it difficult to mountain bike ride. Go through a gate at the top of the hill and continue downhill to Hunt Creek may encounter some logs across the trail requiring you to carry your bike over them). Cross the creek and head west uphill al two track road for about a mile. At the intersection turn right and follow road up a short steep incline and continue to the inters with the Dunckley Pass Road (County Road #132) Turn left; continue 1.5 miles west to the Chapman Reservoir turnoff. Turn and continue uphill for 2 miles. There will be a sign for the Long Run. A cross-country ski trail. Turn the here and continue following the blue diamonds which mark this trail as a winter cross country ski loop. This trail cuts through an old timber stand and at times may be hard to follow. The road continues along Hunt Creek, crosses Hunt Creek and connects with the trail b. Crosho Lake.
OPTION 2: Follow trail description for Option 1 from Crosho Lake, crossing Hunt Creek and connecting with the Dunckley Road. To extend your trip and funkier explore the Dunckley Pass area continue west for 3.5 miles on the Dunckley Pass Road. Left (south) at the Sheriff Reservoir turnoff (this road is signed). Follow this road about 4 miles south to Sheriff Reservoir. Around and follow road out the way you came in to connect with the Chapman Reservoir Loop and continue onto Crosho Lake route is 5 miles one-way. About 17 miles.
Overall, Crosho Lake / Chapman Loop is the 64th most popular mountain bike trail of all 176 mountain biking rides in Colorado.