Bierstadt Lake, Glacial lake in Rocky Mountain National Park, Colorado, US

Bierstadt Lake is a glacial lake sitting on a lateral moraine inside Rocky Mountain National Park in Colorado, at roughly 9,400 feet (about 2,865 meters) above sea level. Dense pine forests ring the water on all sides, with steep ridges closing off the basin and giving the lake a sheltered, enclosed feel.

The basin formed thousands of years ago when the Bartholf Glacier retreated and left behind a wall of debris that dammed the moraine. That natural barrier has held water in place ever since, keeping the lake's shape largely unchanged over time.

The lake is named after Albert Bierstadt, a German-born painter who became famous for his large-scale paintings of the American West in the 1800s. His work helped shape how people across the country imagined mountain landscapes they had never seen in person.

Two trailheads give access to the lake: Bear Lake Trailhead offers a more gradual approach, while Bierstadt Lake Trailhead leads up a steeper slope. Both routes are clearly marked, but the elevation means it is worth pacing yourself and giving your body time to adjust before pushing on.

Native Americans first called it "Hanging Lake" for its perched position on the side of the Bartholf Glacier. The name Bierstadt was made official in 1932, though it had already appeared on a reprinted U.S. Geological Survey map in 1922. The painter's 1877 canvas of the lake, now in the Denver Art Museum, carries "Whyte's Lake" on its back.