Robert Trent Jones Jr. designed two courses at Heron Lakes Golf Club, an Audubon Cooperative Sanctuary just north of downtown Portland. Both layouts hosted a U.S. Amateur Public Links, with the Greenback course first hosting in 1979, followed by Great Blue in 2000. Greenback opened in 1972 and was the first course built at Heron Lakes. It’s a more traditional parkland layout than Great Blue, with large, often elevated greens. With six ponds on the course, there is plenty of water in play.