Cape Disappointment State Park is located at the mouth of the Columbia River and is a key site along the Lewis and Clark Discovery Trail. The Discovery Trail is a ten-foot-wide paved non-motorized trail that will run from the city of Ilwaco's waterfront, west to the state park, and then northerly along the beach to the city of Long Beach - a distance of __ miles. While the trail traverses a portion of the state park, it does not provide access to major attractions. State Route 100 provides motorized access to the park, but due to site and environmental constraints, the substandard road cannot be widened or rerouted to accommodate a bike lane. The road is quite narrow and presents an extremely hazardous condition for hikers and bikers. This project will construct two miles of trail, grade separated, but running mostly parallel to SR100, to provide non-motorized access from the soon-to-be-completed Discovery Trail to the main State Park hub. This hub, known as the Isthmus, contains the park administrative headquarters, a campground, boat launch, major interpretive facilities and beach. The project will provide a safe route into the park and will provide a significant expansion of recreational opportunities for visitors using the Discovery Trail. Due to difficult terrain and consideration of marbled murrelet habitat, extraordinary design and construction considerations will be necessary.