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 Northwestern United States by volume, and the seventeenth widest in the world. Horseshoe in shape, it is 1,500 feet wide and 40 feet high with a flow of 30,849 cu ft/s, located 26 miles upriver from the Willamette's mouth.
Until 2011 a canal and set of locks allowed vessels to pass into the main Willamette Valley. Those locks are now closed.