The Portland trail is a 27.92 km hiking route along the Columbia River in Vancouver, Washington, featuring minimal elevation gain of just 1.5 meters, making it accessible for hikers of all skill levels. This historic trail follows the Lewis & Clark National Historic Trail corridor and offers 348 immersive scenic viewpoints along the waterfront. Hikers can enjoy expansive river vistas, historical significance, and real-time water level data while exploring this flat, riverside path perfect for long-distance walking and historical exploration.