Mount Baker Wilderness is a 119,989-acre (48,558 ha) wilderness area within the Mount Baker-Snoqualmie National Forest in the western Cascade Range of northern Washington state.

Its eastern border is shared with the boundary of the Stephen Mather Wilderness and North Cascades National Park for a distance of 40 miles (65 kilometers).

[2] Almost entirely within Whatcom County, the wilderness lies on the western slopes of the Cascade Mountains.

On mountains and higher ridges, considerable areas of rock and permanent glaciers (over 10,000 acres (40 km2)) occur.

[4] Download coordinates as: The terrain is rugged, with steep slopes and numerous ridges dissected by small intermittent or permanent drainages.