The Thornapple Trail is the abbreviated name for the a partially completed Paul Henry-Thornapple Trail (rail trail) in west Michigan. The Middleville portion is being connected to the Kent County section which will eventually link to Kent Trails. When complete, the Paul Henry - Thornapple Trail will be a 42 mile multi-use recreation trail running from Grand Rapids, Michigan to Vermontville, Michigan.[1]
http://www.thornappletrail.org/