The Willamette Falls is a natural waterfall on the Willamette River between Oregon City and West Linn, Oregon, in the United States. It is the largest waterfall in the American Pacific Northwest by volume, and the seventeenth widest in the world. Horseshoe in shape, it is 1,500 feet (460 m) wide and 40 feet (12 m) high with a flow of 30,849 cu ft/s (874 m³/s), located 26 miles (42 km) upriver from the Willamette's mouth.