Prairie Mountain is a 5,678 ft mountain summit near the western edge of the North Cascades, in Snohomish County of Washington state. It is located six miles east of Darrington, Washington, and northwest of Glacier Peak which is one of the Cascade stratovolcanoes. It is situated on land administered by the Mount Baker-Snoqualmie National Forest. The nearest higher peak is White Chuck Mountain, to the south-southeast. Precipitation runoff from Prairie Mountain drains into the Sauk River and Suiattle River, both tributaries of the Skagit River. The mountain was so named because of the beautiful prairie at its base.