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Mount Bierstadt

 West Slopes
Difficulty Class 2 
Ski/Board: Intermediate, D3 / R1 / II  
Risk FactorsExposure: Low
Rockfall Potential: Moderate  
Route-Finding: Low  
Commitment: Low  
 
TrailheadGuanella Pass
Start11,669 feet
Summit14,066 feet
Total Gain2,850 feet
RT Length7.25 miles
Last UpdatedJun 2025
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A Note from CFI
CFI
During summer 2025, the Colorado Fourteeners Initiative will be hard at work improving the trails, including on Mt. Bierstadt. Specifically, CFI trail crews will focus on repairing the wooden boardwalk that guides hikers through the Scott Gomer Creek willow carr as well as installing raised causeways along parts of the trail that become muddy during seasonal runoff. If you encounter a CFI crew on the trail, kindly give them a heads-up as you approach, so they can give you any necessary instructions—or simply get out of your way.  Read more...

Trailhead

From the north: Take the Georgetown exit off of Interstate 70. Drive through Georgetown and follow the signs for the Guanella Pass Scenic Byway. Drive 12 miles to the top of Guanella Pass (11,700') and park in one of the two large, paved parking areas on either side of the road. The Bierstadt trail starts near the parking area on the east side of the road. The upper parking area (on the west side of the pass) has restrooms. From the south: Take US 285 west from Denver or east from Fairplay. Drive to the town of Grant which is about 12 miles west of Bailey. In Grant, turn north on the Guanella Pass Scenic Byway and drive approx. 13 miles to Guanella Pass.

Route Description

Taken from Guanella Pass,  1 provides an overview of the route. Locate the Bierstadt Trail and begin by descending east toward Scott Gomer Creek -  2. Navigate through willows on wooden bridges and trail sections for nearly a mile ( 3 and  4) to reach the creek , near 11,500' -  5. Cross the creek and continue through the willows as you approach Bierstadt's west slopes. Near 11,800', switchback up a steep slope and exit the willows -  6. You'll then reach flatter terrain, near 12,300', on the north end of a shoulder .

With the remainder of the route now in view, hike southeast up the shoulder -  7. Pass an overlook at 12,600' and continue higher -  8 and  9. Around 13,000', the terrain becomes noticeably steeper -  10. Follow the well-defined trail ( 11 and  12) and zigzag your way up to a ridge crest, at approximately 13,750' -  13. Walk northeast to the base of the final pitch -  14. While the summit may not yet be visible, only 250 feet of elevation gain remains. This final section is the crux of the route and the reason it earns a Class 2 difficulty rating. Without a trail, navigate your way through the boulders, staying on or just left of the ridge crest -  15. When the terrain eases, walk a short distance further to reach the summit -  16 and  17.

In Winter

In winter, the Guanella Pass road is closed 1.5 miles before the pass, adding 3 miles round-trip to your route. Park at the winter closure and walk the road to reach the summer trailhead.

Skiing?

Meh. The west slopes provide a mellow ski but you'll want to plan ahead to make sure there's enough snow for a decent ski.

Notes

IMPORTANT: This route enters the Mount Evans Wilderness area. Designated wilderness areas have special regulations and restrictions for party size, dispersed camping, campfires, etc. Also, dog owners should read the wilderness information carefully because some wilderness areas prohibit dogs to be off-leash and/or limit how close dogs can be to lakes and streams. If you have questions about the wilderness area, please contact a U.S. Forest Service office for the National Forest(s) listed above.
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