Unicorn Peak is a 5,100-foot-elevation (1,554-meter) mountain summit located within Olympic National Park in Clallam County of Washington state.

Topographic relief is significant as the west aspect rises 4,800 feet (1,463 meters) above the Elwha valley in approximately three miles.

[5] Weather fronts originating in the Pacific Ocean travel northeast toward the Olympic Mountains.

As fronts approach, they are forced upward by the peaks (orographic lift), causing them to drop their moisture in the form of rain or snow.

[7] The mountains were sculpted during the Pleistocene era by erosion and glaciers advancing and retreating multiple times.