Steep granite walls and jagged cliffs rise around a rocky alpine cirque beneath Longs Peak, with a small waterfall spilling down the talus in the foreground. Morning light catches the pale rock on the right while the upper face of the mountain stays in cool shadow under a clear blue sky.

Longs Peak from the Chasm Lake Trail

Estes Park, CO

Chasm Lake sits at 11,760 feet in a dramatic cirque directly beneath the Diamond, the sheer 900-foot east face of Longs Peak. The 4.2-mile trail from the Longs Peak Trailhead gains over 2,300 feet of elevation. The lake reflects the towering Diamond face when conditions are calm.

Photography Guide

Best Time: morning
Crowds: Moderate
Shot Types: landscapereflectionwide
Best Seasons: summer

Practical Tips

Start by 4-5 AM to reach the lake before afternoon thunderstorms develop. The final approach crosses steep snowfields well into summer; microspikes and trekking poles are highly recommended.

Is it a good day to go?

7-day outlook

Mild, dry days with light winds are the most comfortable for a visit.

Forecast by Open-Meteo. Verdicts weigh the forecast against the conditions that suit this spot.

Author's Comments

The Diamond does not reveal itself slowly. You climb for hours through krummelholz and switchbacks and a long traverse above treeline, and then you come around the final shoulder and the east face of Longs Peak is simply there, vertical and impossible, rising nine hundred feet straight out of the cirque. Chasm Lake sits at its base like an offering. I have been up here in July and again in early August, and the trail is the same hard arithmetic both times. Two thousand three hundred feet of gain. Four miles that feel longer because the air thins as you climb. By the time you reach the lake at 11,760 you have earned what you are looking at, and the mountain knows it. Start at four in the morning. I mean this practically and I mean it for the photograph. The Front Range builds weather by noon in summer, and the afternoon thunderstorms above 11,000 feet are not something to negotiate with. But the real reason is the light. First sun hits the Diamond around six and the granite goes briefly, almost embarrassingly pink, and if the lake is still - which it usually is at that hour, before the wind comes up over the saddle - you get the reflection that everyone climbs for. The final approach holds snow well into July. Bring microspikes. Bring poles. Bring more water than you think. The wide lens is the obvious choice and it is the right one. But I have made my favorite frame here with something longer, isolating the Diamond against the lake, letting the scale of the face do its own work without the sky to soften it.

Gallery

Chasm Lake sits in a rocky alpine cirque beneath the sheer granite walls of Longs Peak’s Diamond, with calm dark water reflecting the cliffs. Sunlit talus slopes and a small patch of lingering snow contrast with the deep blue morning sky. Photo: KimonBerlin / Wikimedia Commons / CC BY-SA 2.0

A sheer dark granite wall rises out of thick morning fog, with a tiny climber silhouetted near the narrow edge of the cliff. The rest of the mountain fades into mist, emphasizing the scale and exposure of the alpine face. Photo: Khoshhat / Wikimedia Commons / CC BY-SA 4.0

Mist hangs over Chasm Lake beneath the towering gray cliff of Longs Peak’s Diamond, with the calm water reflecting the rock face. A lone hiker stands on a boulder in the foreground, emphasizing the scale of the steep alpine cirque. Photo: Khoshhat / Wikimedia Commons / CC BY-SA 4.0

A narrow waterfall spills down a steep granite chute into a rocky alpine basin, with pale, striated rock slabs and scattered patches of green tundra. The vertical composition emphasizes the rugged, high-elevation landscape under bright morning light. Photo: KimonBerlin / Wikimedia Commons / CC BY-SA 2.0

Steep granite cliffs rise above a rocky alpine slope dotted with patches of green tundra, with a small waterfall spilling down the center under a clear deep-blue sky. The left edge of the Diamond face of Longs Peak peeks into view, emphasizing the high, rugged cirque. Photo: KimonBerlin / Wikimedia Commons / CC BY-SA 2.0

Chasm Lake lies still below the sheer gray cliffs of the Diamond, with Longs Peak’s massive east face rising under a clear deep-blue sky. Rocky talus and a few lingering snow patches frame the dark alpine water in the foreground. Photo: KimonBerlin / Wikimedia Commons / CC BY-SA 2.0

Clear emerald water fills the foreground of Chasm Lake, with rocky shoreline and bright sunlight revealing submerged stones near the edge. Above the lake, steep gray cliffs and the towering granite face of Longs Peak rise sharply into a pale blue morning sky. Photo: KimonBerlin / Wikimedia Commons / CC BY-SA 2.0

A sleepy marmot lies tucked into a narrow crevice beneath a large overhanging boulder, surrounded by pale granite slabs and gravel. The close-up composition highlights the animal’s face and fur against the rough alpine rocks. Photo: KimonBerlin / Wikimedia Commons / CC BY-SA 2.0

A calm alpine lake fills the foreground, its dark green water lightly rippled and reflecting the jagged granite walls above. Snow patches cling to the rocky cirque beneath Longs Peak’s sheer Diamond face under a clear blue morning sky. Photo: National Park Service / Wikimedia Commons / Public domain

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