Muir Glacier is a large glacier located in Glacier Bay National Park in Alaska. It is named after the naturalist John Muir, who explored the area in the late 19th century. The glacier flows from the Juneau Icefield and has been retreating significantly over the past century due to climate change. The glacier is approximately 2.5 miles long and 1 mile wide, showcasing stunning blue ice formations. Visitors can view Muir Glacier by boat or from nearby hiking trails, making it a popular destination for tourists interested in glaciology and natural beauty. Its retreat serves as a visible indicator of environmental changes in the region.