Ice River Glacier is located 2.4 miles (3.9 km) northeast of Mount Olympus in the Olympic Mountains of Olympic National Park in the U.S. state of Washington. Starting at an elevation of 6,400 feet (2,000 m) on the northern slope of a of subpeak of Mount Olympus known as Mercury (6,950 ft (2,118 m)), the glacier flows northwest as it descends. The glacier reaches as low as 5,200 ft (1,600 m) before terminating.