Backpacking the Four Pass Loop: A 3-Day Guide

The Four Pass Loop is a Colorado backpacking classic, taking hikers deep into the heart of the Maroon Bells-Snowmass Wilderness with towering peaks, alpine lakes, and jaw-dropping views at every turn. This 27-mile loop is a rewarding but challenging trek, featuring over 8,000 feet of elevation gain, four high-mountain passes above 12,000 feet, and long stretches above the treeline.

If you’re looking to complete the route in a manageable timeframe while still experiencing its best features, this guide outlines a 3-day, 2-night itinerary with a balanced approach to tackling the loop efficiently and enjoyably.

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Clockwise or Counterclockwise?

The Four Pass Loop can be completed in either direction, but going clockwise tends to offer a more gradual introduction to the terrain and saves some of the most dramatic views for later in the hike. Hiking clockwise also:

Some hikers opt for a counterclockwise route to tackle Buckskin Pass first while legs are fresh, but the clockwise direction provides a more balanced progression throughout the trip. This guide follows the trail clockwise.

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Day 1: Maroon Lake to Fravert Basin

Morning: Maroon Lake to West Maroon Pass

The hike begins at Maroon Lake, a popular starting point known for its stunning reflections of the Maroon Bells. The well-maintained trail leads past Crater Lake (2.5 miles in), which marks the point where day hikers start to thin out. From here, the trail gradually climbs through alpine meadows before reaching the steep ascent to West Maroon Pass (12,500 feet). The climb is demanding but rewards hikers with sweeping views at the summit.

Afternoon: Frigid Air Pass to Fravert Basin

After a short descent from West Maroon Pass, another challenging ascent leads to Frigid Air Pass (12,415 feet). The terrain is steep and exposed, but the panoramic views make it a memorable section. Beyond the pass, the trail drops into Fravert Basin, a lush valley with creeks and waterfalls, offering an ideal campsite near 11,000 feet. This area provides a peaceful resting spot after a full day of elevation gain.

Day 2: Fravert Basin to Snowmass Lake

Morning: Descending Through Fravert Basin

The morning starts with a gradual descent through Fravert Basin, a stunning area filled with evergreens, wildflowers, and flowing water. A river crossing is required at this stage, which may be cold and swift depending on the time of year.

Afternoon: Trail Rider Pass & Snowmass Lake

After the river crossing, the trail climbs steeply toward Trail Rider Pass (12,420 feet). This section can feel relentless, with several false summits before reaching the top. However, the payoff is worth it—upon reaching the pass, Snowmass Lake comes into view, framed by dramatic peaks. The descent toward the lake passes through rocky terrain with some light scrambling before reaching one of the most scenic campsites along the route. Camping along the lake provides a perfect setting to rest before the final day’s push.

Day 3: Snowmass Lake to Maroon Lake

Morning: Snowmass Lake to Buckskin Pass

The final day begins with an early start to catch sunrise over Snowmass Peak, reflecting off the lake’s still waters. The trail then climbs steadily toward Buckskin Pass (12,500 feet). Compared to previous ascents, this climb is moderate, and reaching the summit offers a final rewarding panorama of the surrounding Elk Mountains.

Afternoon: The Long Descent to Maroon Lake

The descent from Buckskin Pass is long but relatively gentle, passing through alpine meadows and aspen groves before reconnecting with the main trail near Crater Lake. The final miles can feel long, but soon the trail emerges back at Maroon Lake, marking the completion of the loop.

Know before you go

The Four Pass Loop is a bucket-list backpacking trip that combines challenging ascents with some of the most breathtaking alpine scenery in the country. With proper planning and preparation, it’s an unforgettable experience.

Have questions or planning your own trek? Drop them in the comments below!