Multnomah Falls is a waterfall on the Oregon side of the Columbia River Gorge, located east of Troutdale, between Corbett and Dodson, along the Historic Columbia River Highway. The falls drops in two major steps, split into an upper falls of 542 feet (165 m) and a lower falls of 69 feet (21 m), with a gradual 9 foot (3 m) drop in elevation between the two, so the total height of the waterfall is conventionally given as 620 feet (189 m). Multnomah Falls is the tallest waterfall in the State of Oregon.


The Multnomah Creek Bridge on the Historic Columbia River Highway.


Colorized picture of the waterfall before the footbridge was added
Underground springs from Larch Mountain are the year-round source of water for the waterfall, augmented by spring runoff from the mountain's snowpack and rainwater during the other seasons.
A foot trail leads to Benson Footbridge, a 45-foot (14 m)-long footbridge that allows visitors to cross 105 feet (32 m) above the lower cascade. The trail continues to a platform at the top of the upper falls, the Larch Mountain Lookout, where visitors get a bird's-eye view of the Columbia Gorge and also of "Little Multnomah", a small cascade slightly upstream from the "upper" falls, which is not visible from ground level. The footbridge is named after Simon Benson, who had the bridge built in 1914.[1]
Benson soon gave Portland land that included most of the falls as well as nearby Wahkeena Falls. The Oregon-Washington Railroad and Navigation Company gave Portland land at the base of Multnomah Falls contingent upon their agreement to build a lodge at the site. A few years later architect A.E. Doyle, who designed the Meier & Frank Building, was commissioned by the city to design the lodge, which was completed in 1925.[citation needed] The lodge is now on the National Register of Historic Places.
In contrast to other falls along the Gorge, the Multnomah area is also reachable via a stretch of I-84 east of Troutdale, Oregon. The rest area and tunnel under the road (as well as the Union Pacific Railroad tracks) allow Interstate travelers from either direction to stop and visit the falls.