Tall mountain peaks illustrate the geologic forces at work in Glacier Bay. NPS Photo. Phone: Although many ice ages sculpted the landscape of Glacier Bay, glaciers are only a part of the geologic history and dramatic scenery of the park. Geologic forces still at work created the Fairweather Mountain Range, one of the tallest coastal mountain ranges in the world, with several peaks over 10,000 feet and the tallest peak, Mount Fairweather, reaching just over 15,300 feet. Without these mountains and the abundant snowfall they receive at high elevation, glaciers would not exist at sea level in a temperate rainforest environment.
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