Upper Oneonta Falls is a waterfall on Oneonta Creek in Multnomah County, Oregon, in the Cascades region, with a total height of about 65 feet. It lies about 10.7 miles southwest of Cascade Locks and roughly 18.3 miles east of Gresham as the crow flies.
At 65 feet it is taller than the typical Oregon waterfall of about 54 feet, ranking 186th of 425 with a recorded height. The water comes down as a plunge, where the water drops vertically and loses contact with the rock face.
The Cascades are a high volcanic range of snow-capped peaks, deep glacial valleys and dense conifer forest of Douglas fir, western hemlock and true firs, with abundant rain and snow on the western slopes. Basalt cliffs and lava flows give the region one of the highest concentrations of waterfalls in the country. Oneonta Creek carries 4 recorded waterfalls; the biggest of them reaches 100 feet.
There are 71 recorded waterfalls in Multnomah County. Middle Oneonta Falls, a 24-foot horsetail waterfall, is under a mile away. Oneonta Falls, a 100-foot plunge waterfall, is under a mile away. Triple Falls, a 64-foot segmented plunge waterfall, is under a mile away.
Upper Oneonta Falls is located at 45.5825° N, 122.0728° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The creek name is confirmed against the federal Geographic Names Information System. The exact position has not yet been verified on aerial imagery, so treat the map pin as approximate. Details on trails, parking and access have not been documented for this waterfall yet.