Cascade Locks is just upstream from the Bridge of the Gods, a toll bridge that spans the Columbia River. It is the only bridge across the Columbia between Portland and Hood River. Cascade Locks is a few miles upstream of Eagle Creek Gorge, a popular scenic area that doubles as an alternate route for the Pacific Crest Trail. Cascade Locks is used frequently by hikers along the Pacific Crest Trail (PCT) to cross the Columbia River. Cascade Locks is the lowest point along the trail, which runs from the Mexico–US border in California to the Canada–US border in Washington, and the largest city directly on the trail.