Mount Wilder is a 5,939-foot (1,810-metre) mountain summit located near the head of the Elwha Valley, deep within Olympic National Park in Jefferson County of Washington state.

[5] It is situated 8.7 miles east-southeast of Mount Olympus, and is set within the Daniel J. Evans Wilderness.

[4] In December 1889, he and James Halbold Christie, the leader of the expedition, climbed through deep snow to the ridge just north of the peak, and finally laid eyes on the interior of the range which had been a mystery.

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.

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