Okanogan–Wenatchee National Forest spans the east side of Washington’s Cascade Range from the Canadian border southward and ranks among the state’s largest protected mountain landscapes. Though now managed as one forest, it grew from the separate histories of Okanogan and Wenatchee, with Okanogan established in 1911, absorbed into Chelan in 1921, and restored in 1955; the two were combined administratively in 2000 and officially took the joint name in 2007. Its terrain shifts from wetter western headwaters to drier eastern slopes, includes extensive old growth and major wilderness areas, and has been repeatedly shaped by large wildfires.