Grand Union Falls is a waterfall on Eagle Creek in Hood River County, Oregon, in the Cascades region, with a total height of about 41 feet. It lies about 6.2 miles south of Cascade Locks and roughly 28.6 miles east of Gresham as the crow flies.
At 41 feet it is on the modest side for Oregon, where the typical waterfall with a recorded height stands around 54 feet; it ranks 256th of 425. The water comes down as a slide, where the water glides down a smooth, inclined rock surface, combined with a punchbowl character.
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. Eagle Creek carries 10 recorded waterfalls; the biggest of them reaches 148 feet.
There are 133 recorded waterfalls in Hood River County. Tunnel Falls, a 172-foot plunge waterfall, is under a mile away. Twister Falls, a 148-foot tiered horsetail waterfall, is under a mile away. Sevenmile Falls, a 52-foot plunge punchbowl waterfall, is under a mile away.
Grand Union Falls is located at 45.5844° N, 121.8540° 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.