Sun Mountain Top to Bottom is a 15.6 mile loop trail located near Winthrop, Washington and is good for all skill levels. The trail is primarily used for mountain biking and is accessible from March until November. 15.6 miles Loop 2300 feet mountain biking Hide Map AllTrails Terrain Road Satellite Expand Map Sign up now to see this map! ReviewsPhotosTracksNo one has reviewed this trail yet. Be the first!