Spanning 1.8 million acres across southwestern Colorado, Rio Grande National Forest protects the headwaters of the Rio Grande River and straddles the Continental Divide along its western boundary. Established in 1908, this forest surrounds the San Luis Valley—the world’s largest alpine agricultural valley and one of the planet’s highest-elevation deserts.
The landscape here shifts dramatically from high desert grasslands to dense spruce-fir forests to alpine tundra above treeline. Elevations range from around 7,500 feet to peaks exceeding 14,000 feet, creating distinct ecosystems within a single day’s drive.
Activities and Access
Twenty developed campgrounds serve as base camps for exploring the forest, including River Hill, Elk Creek, and Thirty Mile campgrounds. Fishing draws anglers to the upper Rio Grande and its tributaries, where cold mountain waters support healthy trout populations. Hiking trails lead through old-growth forests and into the Weminuche and La Garita wilderness areas.
When to Visit
Summer months (June through September) offer the most accessible conditions, with high-country roads typically clear by late June. Fall brings golden aspens and fewer crowds. Winter transforms the forest into backcountry skiing and snowmobiling terrain, though many access roads close seasonally.
Getting There
Alamosa serves as the nearest gateway city, providing lodging, supplies, and services. Forest access points spread across nine counties, with paved highways reaching major recreation areas from both the east and west.
Explore Nearby
- Rio Grande Recreation Area — Public Land in Colorado
- Silver Thread Colorado Scenic & Historic Byway — Scenic Byway in Wisconsin
- Powderhorn Wilderness — Public Land in Colorado
- Alpine Loop Back Country Byway — Scenic Byway in Colorado
- Crestone, Colorado Dark Sky Park — Dark Sky Site in Colorado
