Multnomah Falls, Oregon 1. Multnomah Falls Entrance Located just twenty minutes east of Troutdale, rushes the water of Multnomah Falls. The Oregon side of the Columbia River Gorge National Scenic Area extends from the Sandy River near Troutdale nearly 80 miles east to the Deschutes River. ⇦ Back to Page 8   On to Page 2 ⇨Return to Multnomah Falls |