In 1997, with support from The McKnight Foundation, a group of non-profit organizations led by Trailnet formed a partnership to plan and implement the Confluence Greenway.[1] The Confluence Greenway was planned as a 200-square-mile (520 km2) system of parks, conservation and recreation areas located in the St. Louis, Missouri metropolitan area. Various parks, trails, and attractions are located along forty miles of both the Missouri and Illinois banks of the Mississippi River and Missouri River.