McCall Glacier

glacier, Brooks Range, Alaska, United States

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June 30, 2026

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McCall Glacier is located in the Brooks Range in Alaska, United States. The Brooks Range is the northernmost extension of the Rocky Mountains and lies entirely within the Arctic Circle. This mountain range stretches approximately 600 miles across Alaska and features peaks averaging between 3,000 and 6,000 feet. McCall Glacier has one of the lowest activity indices measured in western North America, at two millimeters per meter. Glaciers, like McCall Glacier, are perennial ice masses that respond to changes in local climate, particularly temperature and precipitation. Their fluctuations can provide insights into past climatic changes.1234

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glacier
Mass balance of mountain glaciers
McCall Glacier, in the northwestern part of the Brooks Range in Alaska, has the lowest activity index (two millimetres per metre) measured in western North America. Glaciers in intermediate climates have intermediate equilibrium-line altitudes, accumulation or ablation totals, and activity indices.
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McCall Glacier, in the northwestern part of the Brooks Range in Alaska, has the lowest activity index (two millimetres per metre) measured in western North America. Glaciers in intermediate climates have intermediate equilibrium-line altitudes, accumulation or ablation totals, and activity indices.
Read More