Sumpter Pines RV Park - Looking for a nice location to place your Park Model? Sumpter Pines RV Park is a great place for summer and winter activities, deep in the Pine trees with shade and privacy. Sumpter has over 350 miles of scenic Snowmobile/ATV trails, hiking, biking, snowshoeing, fishing, boating, hunting, recreational gold panning and more. We are a small town steeped in gold mining and logging history in Eastern Oregon. If you have thought about a Park Model as a "second home", check us out, we would love to talk to you.