West of Carbondale in the White River National Forest, the Four Mile Road (FS300) is a 19 mile route open to off-road motorcycle trails riding. The road passes through aspen and conifer groves and meadows.
Directions from Glenwood Springs: From Glenwood Springs follow the signs to Sunlight Ski Area. Before reaching the ski area turn right on to the gravel road which is FDR #300.
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, Four Mile Road is the 40th most popular dirt bike trail of all 93 dirt biking rides in Colorado.