Trail Compass

Hard hiking trails in Colorado

14 trails rated hard across Colorado state parks, national forests, and recreation areas.

Hard hiking trails in Colorado are serious half-day to full-day commitments. Long mileage, sustained climbing, and sometimes rocky or exposed terrain push these routes well past a casual outing in the Rocky Mountain corridor.

Trail Compass currently indexes 14 hard-rated routes in Colorado, totalling roughly 125 trail miles. The average hard trail in this state is about 8.9 miles long, which is a useful starting point when you are sketching a weekend.

Across the Rocky Mountain corridor, the most reliable hiking season is late June through September; high passes hold snow into July and afternoon thunderstorms build quickly above 11,000 ft. Shoulder-season visits can deliver beautiful empty trails but tilt the difficulty upward — short days, possible snow, and unstaffed entry stations all add friction.

Expect wildlife typical of the Rocky Mountain corridor: mule deer, elk herds in the meadows at dawn and dusk, marmots and pikas above treeline, and black bears in the lower drainages. The risk of a serious encounter is low, but the cost of getting it wrong is high — give animals space, store food correctly, and never approach a young animal even if no parent is visible.

How to use this page: every trail listed below links through to a full guide with distance, elevation gain, route type, best-season notes, wildlife expectations, parking guidance, and nearby attractions. Combine this filter with the Trail Compass park pages to plan a trip around a specific Colorado destination.

All hard trails in Colorado

TrailParkLengthElevationRoute
Black Canyon of the Gunnison Summit Trail Black Canyon of the Gunnison National Park 7.65 mi 2,253 ft Out & Back
Black Canyon of the Gunnison Backcountry Traverse Black Canyon of the Gunnison National Park 12.44 mi 2,790 ft Point-to-Point
Black Canyon of the Gunnison Wilderness Loop Black Canyon of the Gunnison National Park 9.82 mi 1,950 ft Loop
Black Canyon of the Gunnison Saddle Trail Black Canyon of the Gunnison National Park 6.37 mi 1,582 ft Out & Back
Great Sand Dunes Backcountry Traverse Great Sand Dunes National Park 12.45 mi 2,689 ft Point-to-Point
Great Sand Dunes Wilderness Loop Great Sand Dunes National Park 9.37 mi 1,804 ft Loop
Great Sand Dunes Saddle Trail Great Sand Dunes National Park 6.36 mi 1,574 ft Out & Back
Mesa Verde Backcountry Traverse Mesa Verde National Park 12.64 mi 2,821 ft Point-to-Point
Mesa Verde Wilderness Loop Mesa Verde National Park 9.5 mi 2,011 ft Loop
Mesa Verde Saddle Trail Mesa Verde National Park 6.36 mi 1,647 ft Out & Back
Sky Pond via Glacier Gorge Rocky Mountain National Park 9 mi 1,700 ft Out & Back
Chasm Lake Trail Rocky Mountain National Park 8.4 mi 2,500 ft Out & Back
Flattop Mountain Rocky Mountain National Park 8.4 mi 2,900 ft Out & Back
Rocky Mountain Saddle Trail Rocky Mountain National Park 6.37 mi 1,727 ft Out & Back

Other difficulty tiers in Colorado

Easy trails in Colorado Moderate trails in Colorado Strenuous trails in Colorado