Wenatchee National Forest is a U.S. National Forest located in Washington. With an area of 1,735,394 acres (2,711.55 sq mi, or 7,022.89 km²), it extends about 137 miles along the eastern slopes of the Cascade Range of Washington, USA from Okanogan National Forest to Gifford Pinchot National Forest. The forest is located in Chelan, Kittitas and Yakima counties.