The Okanogan National Forest is a U.S. National Forest located in Okanogan County in north-central Washington, United States.The 1499013acre forest is bordered on the north by British Columbia, on the east by Colville National Forest, on the south by the divide between the Methow and the Stehekin–Lake Chelan valleys, and on the west by North Cascades National Park. The closest significant communities are Omak and Okanogan. Managed by the United States Forest Service together with Wenatchee National Forest, its headquarters are in Wenatchee. There are local ranger district offices located in Tonasket and Winthrop. It is the second-largest national forest (after the Nez Perce National Forest in Idaho) that is contained entirely within one county and largest of which in Washington.
