Mount Stone, Mountain summit in Mason County, Washington, US

Mount Stone is a 6,612-foot (2,015 m) peak in the Olympic Mountains and the highest point in Mason County, Washington, rising more than 2,000 feet (610 m) above its surroundings. Its summit is reached by a class 3 rock scramble with about 5,000 feet of elevation gain over 11 miles round trip. Runoff from the mountain drains into tributaries of the Duckabush, Hamma Hamma and Skokomish rivers.

Mount Stone lies in the Olympic Mountains and is the highest point in Mason County, Washington, at 6,612 feet (2,015 m). Its slopes drain into tributaries of the Duckabush, Hamma Hamma and Skokomish rivers. The mountain sits in the marine west coast climate zone of western North America, where Pacific fronts forced upward by the Olympic peaks drop heavy rain and wet snow.

Mount Stone is the highest point in Mason County, a distinction that draws peak-baggers working through Washington's county high points. The standard route is a class 3 rock scramble with about 5,000 feet of elevation gain over 11 miles round trip, often done as an overnight with a camp at the Lake of the Angels near 4,900 feet.

The climb starts from the North Hamma Hamma Road and covers about 11 miles round trip with 5,000 feet of elevation gain, including a class 3 rock scramble. Camping is possible at the Lake of the Angels at roughly 4,900 feet, so the route works as a day climb or an overnight trip. Snow is often wet and heavy, raising avalanche danger in winter.

Mount Stone is the highest point in Mason County, at 6,612 feet (2,015 m), and rises more than 2,000 feet above its surroundings. Its summit is reached by a class 3 rock scramble with about 5,000 feet of elevation gain over 11 miles round trip, and climbers can camp at the Lake of the Angels at roughly 4,900 feet.