26.2 miles
Distance
7,700 ft
Climb
-7,698 ft
Descent
2 miles
High Point
2 ft
Altitude change
9,566 ft
Altitude min
9,566 ft
Altitude start
9,570 ft
Altitude end
-128.1%
Grade max
83.6%
Grade min
13 miles
Distance climb
12 miles
Distance down
4,403 ft
Distance flat

Four Pass loop is a classic Colorado backpacking and trail running trail located in Aspen. The name comes from the four mountain passes that the trail works through: Buckskin Pass, Trail Rider Pass, Frigid Air Pass and West Maroon Pass. This 27 mile loop gains almost 8,000ft and stays above 10,500ft for almost the entire day. I don’t say this lightly, but the Four Pass loop is a destination hike and worthy of a trip to Colorado on its own right.

Detailed Description
Four Pass Loop is a 26 mile moderately popular expert route located near Maroon Bells - Snowmass Wilderness Area Colorado. This hike primary route and has a hard overall physical rating. This route includes 5 trails. This route climbs 7,700 ft with a max elevation of 12,471 ft then descends -7,698 ft.

Trail Issues on Route

  • Minor Issue / Yellow: 2 trails (newest: Sep 20, 2025)
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Stats

  • Distance
    26 miles
  • Avg time
    24 hr 36 min
  • Altitude min
    9,566 ft
  • Altitude start
    9,566 ft
  • Altitude end
    9,570 ft
  • Climb
    1 mile
  • Descent
    -7,698 ft
  • Grade max
    -128.1%
  • Grade min
    83.6%
  • Distance climb
    13 miles
  • Distance down
    12 miles
  • Distance flat
    4,403 ft

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Trails in Route

Details

Directions

  1. Walk southwest on Maroon Snowmass.
  2. Continue for 500 meters.
  3. Keep right to stay on Maroon Snowmass.
  4. Continue for 300 meters.
  5. Keep right to stay on Maroon Snowmass.
  6. Continue for 1.5 kilometers.
  7. Turn right to stay on Maroon Snowmass.
  8. Continue for 600 meters.
  9. Keep left to take West Maroon.
  10. Continue for 800 meters.
  11. Keep left to stay on West Maroon.
  12. Continue for 200 meters.
  13. Turn left to stay on West Maroon.
  14. Continue for 8 kilometers.
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    Recent Trail Reports Along Route

    statustraildateconditiondescription
    Maroon Creek
    Sep 20, 2025 @ 7:32am (America/Denver)
    Sep 20, 2025
    		Some mud
    West Maroon Trail Alt
    Sep 18, 2025 @ 8:52am (America/Denver)
    Sep 18, 2025
    		Some mud puddles/mud
    more reports »
    • By 1Hunter-RTF Pro & contributors
    • #36442 - 1,362 views

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