Chasm lake is one of the most beautiful and breathtaking trails I have ever done. The forest for the first 2 miles is dense and offers great shade and it blocks any wind from the mountain. You can also find little water falls along the way. Once you make it past the tree line the view of Twin Sisters peak is awesome and the alpine tundra is amazing the plants are super unique and pretty. After this point you will make it to the intersection between chasm lake and the keyhole this offers a great resting spot this is where you get your first views of Longs peak the next section of trail is directly on a steep ledge be careful on this part if you walk wobbly or are unbalanced. This was my favorite part of the hike it has scenic water fall views and a boulder field. After this you reach the final point which is a slight climb up another boulder field. Once at the top you will reach Chasm lake which is a stunning lake surrounded by mountains the rock faces are steep and are breathtaking. Chasm lake is a must do in Rocky Mountain!

Beautiful trail, it was a lot of snow, a lot. Hiking shoes are highly recommended. Sunscreen is a must, high elevation sun Is agresiv. It’s hard but its worth it

My husband and I ventured up to Chasm Lake by accident. We missed the turn off for Long’s Peak on the Key Hole Route. I would rate this hike as moderately difficult in terms of elevation gain and terrain. We started at around 3:30 a.m on a Saturday in July. The parking lot was already full and we had to park along the road (about 1/4 mile away).There is a beautiful creek I could only hear on the way up since it was still dark out. The views along the way are breath taking. We stopped to have a snack and saw a marmot. Be leary of them, I’ve been told they like to take snacks. Overall well worth the hike. It took about 3 hours to get up to the lake and about an hour and 45 minutes to get down from the lake.

This is hike has a beautiful pay off but it takes some work to get there. It's rating on All Trails is due to the elvation gain of 2500 feet over 3.7 miles one way. Plus there are many, many rocks and step ups, which is a good leg work out. At the base you look up at Longs Peak. Serious caution- Do Not Attempt this hike with out proper clothing, water and hiking shoes. The temps at the top drop quickly and the weather changes just as quickly. This is one approach to Longs Peak if you don't konw about Longs read up.

This is one of the best hikes in RMNP! The hike starts at the Long's Peak trailhead. Unless you arrive well before sunrise you will probably not get a parking space in the lot during the summer. Simply park along the road and walk uphill to the ranger station. The trail climbs steadily uphill and in the forest for the first 2.0 to 2.5 miles or so. Once you're out of the trees the trail opens up and enters the alpine zone. You still have another uphill mile or more until you reach Chasm Junction. The Boulder Field and Long's Peak trail heads right and Chasm Lake heads left. There is a privy there if needed. From here the trail is mostly flat as you follow a ridge that overlooks Peacock Pool and Columbine Falls. You cannot see Chasm Lake until you complete a relatively easy rock scramble to reach it. It’s a great and moderately challenging 9-mile hike with an elevation gain of about 2,600 feet. Have some clothing layers, water and calories in your backpack and enjoy the day.