Home Page Cape Disappointment State Park Downloadable PDF The PDF is a fairly large file with enough detail for zooming in and printing at 300 dpi. This park is located on the north side of the Columbia River near Ilwaco, WA. There are several miles of hiking trail through rugged forest foothills and other trails suited for bicycles. The paved Discovery Trail crosses the road at the north end of the park - go right for Ilwaco, or left to follow the beach to Long Beach.