In the Park
Old Fall River Road in Rocky Mountain National Park is a steep, one-way, gravel road with spectacular views for suitable passenger cars, trucks, or SUV's. Vehicles are not allowed off-road in the Park.
In the National Forests
Roosevelt and Arapaho National Forests offer many popular four-wheel driving roads for SUV's, dirt bikes and ATV's. See the Forest maps for locations; off-highway does not mean off-road. Many of these roads are adopted by local four-wheel drive clubs. Be considerate, 4-wheelers share these roads with mountain bikers, hikers and wildlife. Weather and wildlife may close roads. Check road conditions at district offices or the web links to the left.
Click on the links at the left for more information on Four-Wheeling in Canyon Lakes Ranger District, Roosevelt National Forest or Boulder Ranger District of Roosevelt National Forest.
The Forest Service has produced Motor Vehicle Use Maps (MVUM) of areas open to motorized travel:
The Sulphur Ranger District of Arapaho National Forest (west of Rocky Mountain National Park) has published one for the north area (1.4M pdf file) around Grand Lake (north of Granby and Hot Suplhur Springs) and one for the south area (775K pdf file) around Winter Park (south of Granby and Hot Suplhur Springs). The legend for both maps is on the north map.
The Canyon Lakes District north of Rocky Mountain National Park (east of Estes Park, west of Loveland and Fort Collins).
Boulder Ranger District (around Nederland, east of Rocky Mountain National Park, west of Boulder, Lyons, Longmont).
Clear Creek Ranger District (south of Rocky around Idaho Springs).
Also, refer to the Forest maps available from their district offices listed on our Contacts page or by order from the link on our Maps page. The Forest website has FAQs on their MVUMs.