Clark Mountain, in Washington’s North Cascades within Wenatchee National Forest, rises 8,602 feet as the highest summit in the Dakobed Range near Glacier Peak and Luahna Peak. Its rugged setting is marked by steep relief and glaciers, with Richardson Glacier on the northeast side and Clark Glacier on the east slopes. The mountain is part of a landscape formed over millions of years by tectonic activity as the North American Plate overrode the Pacific Plate and terranes accreted about 50 million years ago. Later, repeated Pleistocene glaciations, along with uplift and faulting, carved the deep valleys and sharp topography that define this dramatic high country.