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Multnomah Falls â Oregonâs Tallest Waterfall. Multnomah Falls â A stunning Waterfall located in the Oregon side of Columbia River Bridge. It is a 611 foot tall waterfall making it the tallest of the Oregon. The falls is an absolutely gorgeous.
Oregon. The sunrise rises at Elk Lake, OR. Photo by Eric Valentine. From near Siskiyou Summit (elev. 4,310â²) in southern Oregon to the Washington border, this section is both the shortest and the easiest to hike or ride.