McCullough Gulch to Upper Blue Reservoir
McCullough Gulch Trailhead
5.0
3 Reviews
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Details
Distance
6.45 miles
Elevation Gain
1532 ft
Route Type
Out-and-Back
Features
Lake
Wildlife
Waterfall
Dog Friendly
Scenic
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About this place
Added by Outbound
With peaks, lakes, and waterfalls, McCullough Gulch to Upper Blue Reservoir is steep in parts, but always scenic and worth the push.
The trail first takes you to Upper Blue Reservoir, about 1.4 miles in. Past this point, it can be somewhat tricky to find the trail, but for experienced hikers, the upper valley holds a number of lakes, a waterfall, and open tundra for exploring. Mountain goat sightings are also common in this area, so keep an eye out!
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Leave No Trace
Always practice Leave No Trace ethics on your adventures and be sure to follow local regulations. Please explore responsibly.
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Wynn Wiley
11/11/2025
Absolutely gorgeous! We hiked in mid may so there was still some snow scattered here and there which made finding the trail sometimes difficult. ...
Not Crowded
Amazing Views
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Jeff DLB
11/29/2020
Wrong name of lake
Beautiful hike, but this lake is not actually called Upper Blue Reservoir, and at this time has no official name. There was an error ...
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Jozie Burns
9/12/2016
👍
My first, and favorite, hike I've done in Colorado!
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