Lost Prairie Group Site is located along the Over the Rivers and Through the Woods Scenic Byway and is nestled among the forest in the Cascades at an elevation of 3600 feet. There are 10 campsites, 8 of which are tent only. There is one ADA accessible campsite. Reservations are accepted for reserving the whole park as a group facility. If Lost Prairie is not reserved it may be used on a first-come, first-serve basis for individual campsites.