Moderate
Boulder Grand Pass and Thunder Lake Trail [CLOSED]
Allenspark, Colorado
15.2 mi
Distance
4,747 ft
Elev. Gain
6h 56m
Est. Time
0.0
0 Reviews
About This Trail
The Boulder Grand Pass is in a national park. Go to the Wild Basin and follow the trail up to the lake. The trail goes around the lake and then up to the lake of many winds. You can go around the boulderfield and then up through the obvious chute to the pass. It's a nasty, loose, scree field and the last bit is steep.
Trail Details
Out & Back
Route Type
Dirt
Surface
No Dogs
Dog Policy
Yes
Kid Friendly
No
Permit Required
Elevation Profile
Min:2,600 ft
Max:3,679 ft
1,447 ft
1,447 ft
Reviews
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Trail Conditions
Trail Conditions
Unknown
Updated Unknown
No recent condition reports. Be the first to share what you see on the trail.
![Boulder Grand Pass and Thunder Lake Trail [CLOSED]](https://www.nps.gov/common/uploads/structured_data/3C873CC3-1DD8-B71B-0B076FC2806DF140.jpg?width=800&quality=80)
Boulder Grand Pass and Thunder Lake Trail [CLOSED]
24.5 km5.0
Moderate
Ouzel Lake Trail [CLOSED]
15.1 km
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Lion Lake Trail [CLOSED]
20.0 km
Difficult
Finch Lake and Pear Reservoir Trail [CLOSED]
21.6 km
Difficult
Wild Basin Trail to Allenspark Trail [CLOSED]
14.8 km
Moderate
Thunder Lake Trail [CLOSED]
18.0 km
Difficult
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