Hike to Chasm Lake

Longs Peak Trailhead - Search Nearby - Added by Kyle Frost

Get the classic sunrise shot on Longs Peak. A fantastic (relatively) short hike with sublime views. 9 mile roundtrip hike with 2500' elevation gain. Option to summit Longs Peak (14255') if you've got the energy.

The 4.5 mile trail climbs around 2500ft from the Longs Peak trailhead, and starts by winding through dense forest. In the morning darkness, trudging through thick trees isn’t the most exciting, but when you finally climb out above treeline, the massive profile of Longs and the slowly growing light on the horizon is a welcome sight.

Make sure you know your hiking speed and leave early enough to arrive at the lake for the classic 'Sunrise hitting Longs Peak' shot! If you've got energy to spare after taking in the sunrise, backtrack a little back to East Longs Peak Trail and head up to the peak through the Keyhole route. This will tack on another 5.5 miles and add an additional 2500' in elevation, so make sure you're ready!

Distance

9 Miles RT

Elevation Gain

2500 ft Gain

Type

Out-and-Back

Activities

Photography, Hiking

Forest
Lake
Scenic

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Boulder A-Lodge Hostel

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We want to acknowledge and thank the past, present, and future generations of all Native Nations and Indigenous Peoples whose ancestral lands we travel, explore, and play on. Always practice Leave No Trace ethics on your adventures and follow local regulations. Please explore responsibly!

Reviews

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Overall rating: 

Chasm lake

Hiked this on 9/30/17. We started on the trail around 8am and made it to the lake around 10:30am or so. The hike itself is gorgeous with lots of viewpoints. The last bit of the hike takes you through a path of shale... the path is good, however there is definitely ice/ light snow over parts of it. The view at the lake is gorgeous and definitely worth it. Bring layers b/c there is little protection from wind if you go on a breezy day (which we did). Enjoy the hike, it's amazing :)

Great Day Hike

One of the best day hikes near Boulder area. The Chasm meadow leading up to the lake is absolutely wonderful. It is really awesome to hike in the winter too when the lake is frozen over.

Dani Rodriguez

almost 2 years ago

Still Worth It

After hearing about how amazing this hike was, I decided to see for my own eyes the wonderful view. Unfortunately, me and the weather weren't on the same page on the way there. I couldn't see anything more than a couple feet in front of me because of the fog, and it even started to rain during the third mile (luckily I brought a poncho)! However as I stopped to turn back on the last mile (there was an icy patch that wasn't safe to cross), the fog cleared up and I had the most incredible view from the mountain side. So, to anyone who is worried about the weather, just keep going and I promise it will be worth it!

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