Chasm Lake

★5.0
GoldenGateBridge_BakerBeach_MC

A dramatic alpine lake set beneath steep granite cliffs, accessed by a steep climb through forest and exposed mountain terrain.

General Information
Length:
~8–9 miles round trip
Elevation Gain:
~2,500 ft
Difficulty:
Strenuous
Hours:
Open year-round; best accessed late spring through fall
Daylight hiking strongly recommended
Fees:
$30 per vehicle (Rocky Mountain National Park pass, valid for 7 days)
Timed entry permits may be required during peak seasons
Pet Policy:
Pets are not allowed on trails within the national park
Seasons:
Late spring through fall; best in summer for clear trails and alpine conditions
Closest cities with hotels:
Estes Park (4 mi)
Location:
Chasm Lake, Rocky Mountain National Park, CO
Website:
nps.gov/romo/index.htm

From Estes Park (4 mi): Enter the park and follow route signage to the Longs Peak Trailhead, where the hike to the lake begins.

Overview

The Chasm Lake is set high within a dramatic alpine basin, reached by a steadily climbing trail that passes through dense forest and open subalpine terrain. As the route gains elevation, expansive views begin to emerge, revealing surrounding peaks and sweeping valleys below. The final approach transitions into a rugged landscape of rocks and exposed slopes, emphasizing the remote character of the destination.

At the lake, sheer granite walls rise sharply from the water’s edge, creating a striking amphitheater dominated by towering cliffs and alpine terrain. The reflective surface of the lake mirrors the surrounding peaks, offering a powerful sense of scale and isolation. With its combination of challenging terrain and dramatic scenery, the hike provides a rewarding experience for those seeking a high-elevation destination shaped by both geological forces and time.

This article uses material from the Wikipedia articles and official tourism pages for the Rocky Mountain National Park, which are released under the Creative Commons Attribution-Share-Alike License 3.0.

Sarbjit Bahga, CC BY-SA 4.0, via Wikimedia Commons; Image Size Adjusted
Thomson M, CC BY 3.0, via Wikimedia Commons; Image Size Adjusted