Mount Storm King, Mountain summit in Olympic National Park, Washington, United States.

Mount Storm King is a mountain in Olympic National Park, about 20 miles (32 km) west of Port Angeles, Washington, standing on the south side of Lake Crescent near Barnes Point at over 4,500 feet (1,370 m). Its summit trail begins near the Storm King Ranger Station, sharing the start of the Marymere Falls trail before branching north; the first 1.9 miles (3.1 km) are maintained trail, and the rest is a scramble over loose rock with some exposure.

The mountain received its name in the 1890s during surveying expeditions because sudden weather changes occurred frequently at its peak. This naming choice reflects the location's notable tendency to experience rapid meteorological shifts.

The Klallam origin story tells that Mount Storm King, angered by tribes fighting at his feet, broke a boulder from his peak and threw it at the warriors, killing them and cutting Tsulh-mut in two, which created Lake Crescent and Lake Sutherland. The mountain rises on the south side of Lake Crescent near Barnes Point.

The trail to the summit requires proper hiking gear and plenty of water for the multi-hour journey. It is wise to wear good shoes and weather-resistant clothing since conditions can change quickly.

Around 1100 BCE an earthquake sent the 7,200,000-cubic-metre Sledgehammer Point Rockslide off Mount Storm King into Lake Crescent, whose water there is at least 140 metres deep. The resulting megatsunami in the lake is estimated to have run up 82 to 104 metres.