Charley Harper (American, 1922–2007) The Rocky Mountains Charley Harper’s whimsical paintings have been published by more than 50 nature- and conservation-oriented organizations. The Rocky Mountains, created for Rocky Mountain National Park, was one of ten posters Harper was commissioned to create for the National Park Service. You’ll discover a wealth of floral and fauna—perhaps not noticed at first glance—while you piece together this colorful 1,000-piece jigsaw puzzle.