Three Way Peak is a summit located on the eastern border of Mount Rainier National Park. It is also on the shared border of Pierce County and Yakima County in Washington state. Three Way Peak is situated 0.42 mi (0.68 km) north of Cupalo Rock on the crest of the Cascade Range. Its nearest higher peak is Crystal Mountain, to the northwest. Chinook Peak is 0.8 mile to the southwest. Precipitation runoff from Three Way Peak drains into tributaries of the White River and Naches River.