Then in 1911, that part of the Chelan National Forest lying in Okanogan County was recast as the Okanogan National Forest, with headquarters in Okanogan, while the Chelan National Forest continued to occupy the Lake Chelan and Entiat watersheds. At or around the time of the separation of the two forests, ranger districts were geographical entities with rather flexible boundaries and headquarters' locations (i.e., ranger stations). On the Chelan, the districts were the Entiat, the Sawtooth, and the Lake Chelan, with headquarters at Selico, Deer Point and Chelan, and twenty-five Mile respectively.
In 1921, by proclamation dated December 1920, the Okanogan and Chelan forests were again combined as the Chelan National Forest. Its office was in the First National Bank Building, which is now the Rawsons Building on Second Avenue in Okanogan. At the same time, the Entiat Ranger District joined the Wenatchee National Forest.
With the merger of the Squaw Creek district back into the Twisp district in about 1930, relocating the Winthrop district's headquarters from Eight Mile Ranger Station to the town of Winthrop in 1918, and carving the Pasayten Ranger District from Winthrop in 1936, the Chelan National Forest by the beginning of World War II was still a far-flung administrative entity. When the supervisor's office moved to the new Federal Building (Okanogan Post Office) in 1940, the ranger districts were housed at Conconully, Early Winters (Pasayten), Winthrop, Twisp, Chelan, and Stehekin.
On January 1, 1955, the Chelan Ranger District was assigned to the Wenatchee National Forest, a loss that included the name of the forest, now known again as the Okanogan National Forest. To avoid confusion, the Okanogan Ranger District was renamed Conconully.
The Lake Chelan-Sawtooth Wilderness was designated with the passage of the Washington Wilderness Act of 1984, on lands occupied by the old Chelan Division of the Washington Forest Reserve, now part of both the Okanogan and Wenatchee national forests.
In 1982, the Conconully district was consolidated with the Tonasket district, forest with 3 ranger districts-Tonasket, Twisp, and Winthrop-and the North Cascades Smokejumper Base.
In 1998, the Winthrop and Twisp ranger districts were consolidated and renamed the Methow Valley Ranger District.
2000 - The Okanogan and Wenatchee national forests consolidated into one administrative unit. The headquarters office is located in Wenatchee, Washington. The Okanogan Valley Office located in Okangan, Washington is a subunit of the headquarter.