Timberhill Park is a 1.5 mile out and back trail located near Napa, California and is good for all skill levels. The trail is primarily used for hiking and is accessible year-round. 1.5 miles Out & Back 400 feet hiking 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!