The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to 4,000 feet deep, the canyon stretches for over eighty miles as the river winds westward through the Cascade Range, forming the boundary between the state of Washington to the north and Oregon to the south. Extending roughly from the confluence of the Columbia with the Deschutes River in the east down to the eastern reaches of the Portland metropolitan area, the water gap furnishes the only navigable route through the Cascades and the only water connection between the Columbia Plateau and the Pacific Ocean. It is thus the route of Interstate 84, U.S. Route 30, Washington State Route 14, and railroad tracks on both sides.
A popular recreational destination, the gorge holds federally protected status as the Columbia Gorge National Scenic Area and is managed by the Columbia River Gorge Commission and the U.S. Forest Service.