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MAROON BELLS / COLORADO

Four Pass Loop — Maroon Bells

The classic Maroon Bells–Snowmass Wilderness backpacking loop: four 12,000-foot passes, alpine basins, wildflowers, and some of Colorado’s most photographed mountains.

AdvancedMulti-DayRocky Mountains
DistanceAbout 28 miles
Time3–4 days
GainAbout 8,000 ft total gain
SeasonBest window is generally July–September

What this adventure is about

The Four Pass Loop circles through the Maroon Bells–Snowmass Wilderness over West Maroon, Frigid Air, Trail Rider, and Buckskin passes. The route repeatedly climbs above 12,000 feet and drops into broad alpine valleys, making it a compact but serious backpacking objective.

Highlights

  • Four major alpine passes
  • Maroon Bells and Snowmass scenery
  • Wildflower-filled basins
  • A true Colorado bucket-list loop
Route styleHigh-alpine backpacking loop
Group styleExperienced backpackers with altitude readiness

What you’ll carry

  • Backpacking pack
  • Shelter and sleep system
  • Bear canister or approved Ursack
  • Water treatment
  • Cold-weather layers
  • Rain protection
  • Trekking poles
  • Navigation backup

What sleeping outside looks like

Overnight camping is controlled by permit zones in the Maroon Bells–Snowmass Wilderness. Your nightly zone plan is part of obtaining the correct permit.

Fuel the day, then the next one

Carry the full food load for the trip and treat backcountry water. High altitude, sun, and repeated passes increase both hydration and calorie demands.

Prepare for the actual demands

Prior backpacking experience is strongly recommended. Build loaded-pack hiking, long climbs, 3,000+ foot days, and back-to-back mountain efforts.

The practical stuff

Overnight permits are required, and access from the Maroon Scenic Area can also involve parking or bus reservations. Permit zones and transportation should be planned together.

Plans change when conditions do

Four high passes mean exposure to altitude, thunderstorms, snow, cold nights, and rapidly changing conditions. Early starts and conservative weather decisions are part of the trip, not optional extras.

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