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Chasm Lake

Key Hole Route, Rocky Mountain National Park, CO
Review Highlights
RMNP - What you need to know before you go

Rocky Mountain National Park (Colorado) Quick Facts Things to see: Estes Park, Emerald Lake... read more

Reviewed October 20, 2016
Houston, Texas
Beautiful Hike

We went to this trail on a weekend in the end of September. It was literally the second most... read more

Reviewed September 29, 2016
Fort Collins, Colorado
Read all 9 reviews
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Located in Rocky Mountain National Park along the Key Hole Route.
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Travelers talk about
“tough hike” (4 reviews)
“longs peak” (4 reviews)
Key Hole Route, Rocky Mountain National Park, CO
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Reviews (9)
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Reviewed October 20, 2016

Rocky Mountain National Park (Colorado) Quick Facts Things to see: Estes Park, Emerald Lake, Trail Ridge Road, Adams Falls, Bear Lake and Chasm Lake. When to visit: The best time to visit the park is during the summer months when all the pass roads are...More

Thank ClaireRyan_FCW
Reviewed September 29, 2016

We went to this trail on a weekend in the end of September. It was literally the second most beautiful trail that I had ever hiked (1st one was Mt Rainier in June). The fall color was pretty even on the tundra area. Waterfalls everywhere...More

1  Thank xiaocuidiniao
Reviewed September 5, 2016

Quite a challenging hike for us sea-level folks! Well worth the effort. We got one of the last parking spots at the trailhead at 0555 on a weekday Bring lots of water and be prepared for mountain weather.

2  Thank George K
Reviewed April 30, 2016

If you want to get away from nearly everyone in Rocky Mountain National Park, there is no better place to do it than hiking to Chasm Lake. Tucked below the Diamond on Longs Peak, nestled in the cirque between Longs Peak and Mt. Lady Washington,...More

5  Thank Richard R
Reviewed September 18, 2015

First and foremost, my hike to Chasm Lake was done in late August, 2015 during dry ground conditions. The forecast was for clear and sunny conditions all day. I carried a lot of water in my Camelbak and gatorade bottles in addition to a PB&J...More

2  Thank kevina994
Reviewed August 3, 2015

Chasm Lake was a wonderful hike my group of friends did in late July of 2015. Chasm Lake is a 8.4 mile round trip hike that has an elevation gain of almost 2,500 feet. The highest elevation point is 11,823 feet. The hike itself is...More

3  Thank AlexanderDelarge
Reviewed September 26, 2014

After arriving in Denver via the airport early in the day, we were delayed significantly by an accident on the way to RMNP....grrr! We had planned to hike to Chasm Lake, but instead on got approximately 3 miles into the hike before we decided to...More

2  Thank warrenville111
Reviewed August 7, 2014

It's 4.5 miles from the parking lot at Longs Peak trailhead also the starting point for Chasm Lake. The first couple miles climb steadily up through the forest and the trail is well maintained. Once you exit the forest and enter the alpine tundra zone...More

1  Thank JGo52
Reviewed July 28, 2014

We had limited time to hike in the Rockies and chose the Chasm Lake Trail based on reviews. This hike is amazing. The hike takes about 6 hours round trip. Add more time for taking in the views, taking pictures, resting, etc. We did not...More

5  Thank Lizard72magic
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