County Road 128j is a hiking, biking, and horse trail in Boulder County, Colorado. It is within Roosevelt National Forest. It is 6.7 miles long and begins at 8,731 feet altitude. Traveling the entire trail is 13.4 miles with a total elevation gain of 2,679 feet. Mineral Mountain (elevation 10,200 feet) can be seen along the trail.
Sign in/up to upload photos.