The Slough to Sea Trail is a 2.88-kilometer boardwalk and forested trail near Fort Clatsop in Astoria, Oregon, featuring minimal elevation gain of just 18.4 meters, making it accessible for most hikers. This immersive trail follows the historic route of Lewis and Clark through coastal wetlands, offering exceptional opportunities for birdwatching, wildlife observation, and experiencing the same landscapes encountered by the Corps of Discovery expedition over 200 years ago.