Chasm Lake

Lake · Boulder County

Chasm Lake

Lake · Boulder County

1

Colorado 80510

Photos

Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null
Chasm Lake by null

Highlights

Trek to this breathtaking alpine lake nestled at the base of Longs Peak, rewarding adventurers with stunning views and a challenging ascent.  

Placeholder
Placeholder
Placeholder

Colorado 80510 Get directions

Information

Static Map

Colorado 80510 Get directions

Features

Last updated

Mar 4, 2025

Powered By

You might also like

Terms of Use • Privacy Policy • Cookie Policy
 © 2025 Postcard Technologies, Inc.
@travelleisure

"For the more adventurous and experienced hiker, Patterson recommends hiking to Chasm Lake on the east side of the park. The lake sits at the base of Longs Peak, the park’s highest point and one of Colorado’s 14,000-foot peaks. The out-and-back trail to Chasm Lake is 8.4 miles and requires a steady climb through a subalpine forest and into the alpine tundra." - Travel + Leisure Editors

Guide to Rocky Mountain National Park
View Postcard for Chasm Lake

Jonathan Bejar

Google
Pretty easy hike, hour and a half up, hour and a half down. Some people seemed to be struggling and I don’t know why. Other than the Grizwalds talking and spoiling the view (you can hear them in my video) it was an epic sight

Jay Scherger

Google
Amazing hike. Great out & back. Can be done in a half day easy. We went mid-Oct and upper section was pretty icy but we scrambled over the available rocks so it ended up being pretty manageable.

Sky Yoo

Google
(Hiked early October 2023) Trail is in great condition! Watch out for the (completely avoidable) ice in the very short scramble section. Parking lot was packed at 9am, cars all the way down the road. When I got back around 1pm, the lot was already starting to empty.

Kelsey Schultz

Google
Everything I saw about this trail stated the trail, out and back, is 8.8 miles long. I tracked half of it at 5 miles (my phone was about to die before turning back), for a total of 10 miles. More than 2,000 miles of elevation gain. The trail is composed of three sections- forest, tundra, and bouldering and took us about 7 hours to complete (including several breaks, lunch, and time to enjoy the lake). All colors of wildflowers line the path along the way along with several gorgeous waterfalls and brooks. Probably the most beautiful and diverse hike I've been on. This was more difficult than I expected. I read several reviews on AllTrails and knew it would be challenging, but didn't expect this level of difficulty. Also important to note that I'm from the flatland St. Louis area, so my lungs definitely are not acclimated to the high elevation. The lake at the very end was incredible. It felt like a movie getting there. The very last stretch of the trail takes you to a bouldering section where you must climb to reach the lake. The lake is imperceptible until you climb over the boulders. My sister and I swam in the lake, I would guess the water was 40 degrees Fahrenheit. HIGHLY recommend starting as early in the day as possible to avoid afternoon thunderstorms. We got caught in one and feared for our lives. 🙃 We made it down safely, but slid quite a bit on wet rock.

Steve Dempsey

Google
Beautiful hike in the summer and very challenging hike in the winter. It took me a few attempts as the snow was so high the trail was impassable. Expect to make your own trail and blizzard like conditions. Very rewarding though and highly recommend it.

Alicia Sanders

Google
Great hike with about a 2K elevation gain. When we hiked, there were three sections we needed to cross that were covered in snow. Totally doable, but I would recommend spikes, just to be safe. The last .18 miles to the top to get to the lake is mainly climbing up rocks. In total, with a one hour break at the top, it took our group about 6 1/2 hours to complete. Would definitely recommend starting earlier due to the parking lot filling up quite quickly. The longer you wait to do this hike the further you will have to park away from the trail head.

Alex

Google
Short strenuous hike with all around great views. Took us about 4hrs to get up and down. Water was freezing. A few sketchy ice/snow patch crossings. Other than that trail was great and easy to follow.

Jake N Colorado

Google
Absolutely breathtaking, if you are a climber the diamond will steal your breath away! 900 ft of pure granite shooting out of the ground! Many routes to climb! As for hiking chasm was one for the books and I live here. I decided to head into a storm, knowing full well not many would be on the trail, I was right! I got this place practically to myself! Mid May to late October sees unimaginable amounts of people so this was a treat!