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Olympic NP, Washington
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Located on Mount Olympus in Olympic National Park, Blue Glacier covers approximately 2.6 square miles and descends over 3,000 feet from the summit.
The glacier gets its name from the deep blue hue of its ice, which is a result of the dense, compacted ice absorbing all colors of the spectrum except blue.
Scientists regularly study Blue Glacier to understand the impacts of climate change, as it has been retreating over the past century.
The surrounding ecosystem is home to diverse wildlife, including mountain goats, black bears, and the endemic Olympic marmot.
Olympic National Park, where Blue Glacier is located, was designated a UNESCO World Heritage Site in 1981 for its outstanding natural beauty and biodiversity.
Reaching Blue Glacier requires a challenging hike, typically starting from the Hoh Rain Forest Visitor Center and covering about 17 miles one way.
