Thunder Lake Trail

Rocky Mountain National Park, Colorado 80517

Elevation Gain2,284ft
Trailhead Elevation8,884ft
Elevation Min/Max8884/10688ft
Elevation Start/End8884/8884ft

Thunder Lake Trail

Thunder Lake Trail is a hiking trail in Boulder County, Colorado. It is within Rocky Mountain National Park. It is 4.5 miles long and begins at 8,884 feet altitude. Traveling the entire trail is 9.0 miles with a total elevation gain of 2,284 feet. The Tent Rocks (elevation 9,012 feet) cliff and Aspen Knoll, Tahosa, and another camp site can be seen along the trail. The trail ends near the Pine Ridge camp site. There is also an information guidepost near the end of the trail. This trail connects with the following: Wild Basin Trail, Boulder-Grand Pass Trail (unmaintained) and Lion Lake Trail.

Thunder Lake Trail Professional Guides

Detailed Trail Descriptions from Our Guidebooks

Hiking Waterfalls in Colorado (Falcon Guides)
Susan Joy Paul
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"This hike runs through Wild Basin and veers northwest to the eastern slopes of the Continental Divide. Along the way, Mertensia Falls flows long and lovely, dropping hundreds of feet in a tumbling cascade from Eagle Lake and Box Lake, and into North Saint Vrain Creek. Higher up at 12,220-foot Pilot Mountain, “Falcon Falls” pours heartily from Falcon Lake in a long horsetail splash, while Fan Falls splatters and spills its way in a playful cascade. Both falls flow southeast to Thunder Lake and join the waters of Mertensia at North Saint Vrain Creek." Read more

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Trail Information

Rocky Mountain National Park
Nearby City
Rocky Mountain National Park
Skill Level
DeLorme Colorado Atlas & Gazetteer: Page 29 D6, D5, C6, and C5; USGS Colorado Quad Maps: Allenspark, Isolation Peak
Local Maps

Activity Feed

Dec 2018