Multnomah Falls plummets 620 feet in two major steps. The upper fall plunging 542 feet the lower fall 69 feet distinguishing Multnomah Falls as the highest waterfall in the state of Oregon and second highest in the nation. The water flowing over Multnomah Falls water is supplied by natural underground springs that originate on Larch Mountain. In springtime, snowmelt additionally supplies the falls, greatly increasing the flow, width and intensity of the falls’ powerful roaring sound.