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Chasm Lake is a 9.4 mile heavily trafficked out and back trail located near Estes Park, Colorado that features a waterfall and is rated as difficult. The trail offers a number of activity options and is best used from June until October. Horses are also able to use this trail.

Distance: 9.4 miles Elevation Gain: 2,601 feet Route Type: Out & Back

hiking

horseback riding

rock climbing

snowshoeing

bird watching

running

forest

lake

paved

river

views

waterfall

wild flowers

wildlife

rocky

scramble

snow

off trail

no dogs

Reservations to enter the park will go on sale through Recreation.gov at 8 a.m. Mountain Time on Thursday, May 28. Reservations will be available to enter the park from June 4 through July 31. The next release will be on July 1, for the month of August and any remaining days that have not been booked for July. On August 1, reservations will be available for the month of September and any remaining days that have not been booked for August. On September 1, reservations will be available for the month of October and any remaining days in September that have not been booked. Permits issued using the reservation system will allow park visitors to enter the park within two-hour windows of availability between 6 a.m. through 5 p.m. This process will facilitate advance payment of entrance fees, minimize contact between park entrance station staff and visitors and limit congestion in parking lots. The permit system will apply to all areas of the park. In the initial opening phase, the park will open approximately 60 percent of the park’s maximum parking capacity or 4,800 vehicles (13,500 visitors) per day. Trail is fantastic. First part follows the Longs Peak Trail through the woods. Climb is consistent and gentle, very easy. It steepens a bit once you get past the tree line, especially in the stretch immediately before the outhouse at the trail junction. After the junction you go downhill for a bit, and then have to scramble up a ~150 rockfall to reach the lake. Take your time and follow the cairns.

hiking
scramble
57 minutes ago

Really difficult trail for a sea legger like myself. Really struggled on the altitude and was a really tough hike due to that reason (it was the first hike I did while in Rocky Mountain NP). No reservation needed as the trail head (Longs peak) is assessable outside the gates of the park. Small snow patch but easy to cross. Parking lot was full at 8am but you can park on the road leading up to the lot.

hiking
16 hours ago

Nice hike. Abundant wildflowers throughout and plenty of pikas and a couple marmots just before the lake. Arrived at the parking lot at 5:10 AM and snagged the last parking spot. Parking lot fills early since it’s the same trailhead for Long’s Peak. A timed entry permit IS required if entering between 6 AM and 5 PM. Sign at the trailhead is pretty clear about the requirement. Saw 5 different NPS employees as I descended.

hiking
23 hours ago

Could someone confirm if a reservation is required to hike Chasm Lake after 6am? If so, is there any way to access the trailhead without a reservation?

hiking
1 day ago

This is an awesome hike, one of the best in all of the RMNP. It has some of most everything. The hike starts out somewhat steep to get things started, but a really nice walk through a pretty woods. The woods included several streams that were beautiful. Good shade during this part of the hike. Then when you get above the tree line it is it is pretty open and exposed, so bring sunscreen and watch out for storms, better to do the hike in the am for this reason. Steady uphill but not terrible. Really nice panoramic views of the valley. The rock scramble at the end is a bit challenging but not terrible. Definitely worth the effort for the reward at the end with a beautiful lake to sit by and a great view of the highest point in the park. Love this hike!

hiking
great!
rocky
2 days ago

Stupendous

hiking
3 days ago

Fantastic hike.

hiking
great!
scramble
snow
6 days ago

This hike is a MUST at Rocky Mtn. NP. It's a pretty tough hike, but well worth it. Definately our group's favorite hike we went on at the park this week. Still a little snow to cross, but it just makes it a more exciting journey.

hiking
8 days ago

Beautiful hike with a great view of Longs Peak. The trail is actually only about 8.6 miles (but still difficult). Parking fills up fast so if you don't want to necessarily park on the road an earlier start time would probably be better. Still some snow on the trail but was not too bad and manageable to cross without yak traks (or other similar products). This hike never disappoints. You also DO NOT have to make a reservation to do this hike.

hiking
fee
10 days ago

Have this one scheduled for this week. Does any one know if you need to make a reservation for a day pass? Or is it not required? TIA

hiking
10 days ago

Attempted today, June 28, 2020, but turned around about a mile from the lake due to wind. Trail was pretty easy up until this point!

hiking
rocky
scramble
snow
12 days ago

Awesome hike. Perfect weather today. Couple of snow fields, would recommend poles and spikes. A lot of people did it without, but I would still recommend. Lake was beautiful and the trail wasn’t too busy.

hiking
muddy
rocky
scramble
snow
12 days ago

One of the best hikes in RMNP IMHO. Hiked Chasm Lake early in the morning on Saturday, June 27th. Pulled up to the Long’s Peak trailhead at around 5:15A and the main lot was full so I had to park on the side of the road...all good, plenty of parking there. No doubt that this is a strenuous hike, especially on the ascent. Did Sky Pond last weekend and Chasm is definitely more of a challenge in terms of strenuousness and technical sections. It is basically uphill the entire way up, but that makes the way down rather pleasant. Fair amount of scrambling and boulder fields to deal with, and some patches of snow which could be sketchy due to drop offs on the sides. Definitely recommend trekking poles and crampons in your pack until that snow is gone.

hiking
great!
rocky
scramble
snow
12 days ago

Did this on saturday. Took quite a bit of time as I am a newbie and this was the first time at this elevation. The snow field is no joke...had to use spikes and poles but then totally doable at a very slow pace...you really have to be sure your footing is solid before moving forward...especially coming back when it's more slush...but if this newbie can do it then anyone can!! It was so beautiful all the way up and then the lake is just stunning!! A must do hike!!! They did check for a reservation ticket at Longs trail head so be sure to have one if its after 6am.

hiking
13 days ago

Beautiful trail, the snow fields near the lake were a bit slick. Might be worth bringing polls or spikes.

hiking
icy
rocky
snow
13 days ago

Hiked 6/25. Unbelievable hike! A couple snow crossings with a good size drop. Highly recommend

hiking
13 days ago

Great hike, steady difficulty the whole way up, not very hard at all besides distance if you’re not seasoned. The views of Longs Peak are great. Leave the trail better than you found it.

hiking
13 days ago

Awesome lake ! Middle of June and the lake is still partially frozen which made it look like the lake was full of ice cubes. Awesome time of the year to have gone. Hike is half shaded and second half you are roasting in the sun if it’s out. Just before the lake is a pass that can be sketchy when snowy. 6-8 inch wide walk area with a 50 ft slide down to rocks. I was happy to have spikes and poles. Some did it with out. A crazy guy ran across with just trail runners. I took the safer approach. One of my favorite hikes to date due to the lake conditions

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