- Stephen Mather Wilderness (Wikipedia)
The Stephen Mather Wilderness is a 634,614 acres (256,819 ha) wilderness area honoring Stephen Mather, the first director of the National Park Service. It is located within North Cascades National Park, Lake Chelan National Recreation Area, and Ross Lake National Recreation Area in the North Cascade Range of Washington, United States.
- Stephen Mather Wilderness (wilderness.net)
The United States Congress designated the Stephen Mather Wilderness in 1988 and it now has a total of 638,173 acres. \ All of this Wilderness is located in Washington and is managed by the National Park Service.