The Four Pass Loop is considered to be one of the greatest backpacking trips in Colorado, if not the world. Incredible views as you circumnavigate the spectacular Maroon Bells. The difficulties of this hike come in the form of altitude: Trailhead is near 10,000 feet and the lowest point of the trip which goes over 12,000 at the four passes. The Maroon Lake Trailhead is approximately 8.8 miles south/west of Aspen, Colorado. Elevation is approximately 9,600′ to a little over 12,600′ feet. Total loop distance is apx 24 miles (3ish/7.5/6.2/7ish). In the trip you’ll climb over 4 passes, West Maroon, Frigid Air, Trail Rider and Buckskin pass. Though mildly popular (It’s Colorado after all) this trip is rugged and remote with abundant flora and fauna.