Petersen Glacier

Petersen Glacier is a glacier nestled in a high-altitude cirque basin within Grand Teton National Park, sitting at roughly 10,000 feet elevation. The meltwater it produces flows into the surrounding drainage system, feeding alpine lakes and streams below.

The glacier takes its name from Frank Petersen, who made the first recorded ascent of Grand Teton mountain in 1898. This pioneering climb marked an important moment in the mountain's exploration history.

The glacier's continuous monitoring by scientists provides essential data about climate patterns and environmental changes in the Grand Teton region.

Reaching this glacier requires mountaineering experience and specialized gear because of its isolated location in steep terrain. Visitors should familiarize themselves with alpine conditions and weather patterns before attempting the hike.

The meltwater flowing from this glacier carries fine rock particles that give nearby Mica Lake its distinctive turquoise hue year-round. This striking color makes the lake instantly recognizable as you cross the surrounding high country.