County Road 124 is a hiking, biking, and horse trail in La Plata County, Colorado. It is within San Juan National Forest. It is 5.5 miles long and begins at 11,639 feet altitude. Traveling the entire trail is 11.1 miles with a total elevation gain of 2,728 feet. The Kennebec Trailhead parking is near the trailhead. The Cumberland Mine (elevation 11,467 feet) quarry can be seen along the trail.