Southwest of Gunnison, the popular Hartmans Rocks area has a 20+ mile network of trails and jeep roads. It consists of 160 acres at the Base Area managed by the City and County of Gunnison as well as an adjacent 8,000 acres of federal land managed by the BLM. This area receives heavy visitation by a variety of recreationists including hikers, mountain bikers, horseback riders, skiers, and off-road motorcycle riders.
From the large parking area, the broad Hartmans Rocks formation is right in front of you. The trail wind up several routes through the rocks to the summit and down the back side. Continuing southwest, the trails and jeep roads wind long the broad mesa through desert sage and scrub with vistas to the south of the San Juan mountains. While the trails are constantly changing, it's a good idea to start with a map.
To reach the trailhead from Gunnison, head west on US50 to Gold Basin Road (BLM 3062). Turn left heading south on Gold Basin Road for 3 miles to the signed parking area on the right.
Note: Colorado residents must register their off-highway vehicle with the Colorado State Parks (303) 866-3437. Non-residents are not required to register in Colorado, if they are registered in their home states. All off-highway vehicles must have an approved muffler and spark arrester. These requirements are subject to change so make sure to contact the Colorado State Parks prior to using your off-highway vehicle.
Overall, Hartman Rocks ORV Area is the 8th most popular dirt bike trail of all 93 dirt biking rides in Colorado.