|Hartman Rocks has 45 miles of single-track trail, 45 miles of roads, 50 designated dispersed campsites, and countless climbing crags. Single-track trails are perfect for mountain biking, dirt biking, hiking, and trail running. Roads are often traveled by 4x4 trucks, ROVs and ATVs. In the winter months, 16 miles of roads are groomed as cross country ski trails for classic and skate skiing; and some single track trails are groomed as winter single track for fat biking. For more information, please contact the Gunnison Field Office.