Upper Denny Creek Cascades is a waterfall on Denny Creek in King County, Washington, in the North Cascades region, with a total height of about 41 feet. It lies about 14.2 miles east of Tanner and roughly 32.9 miles southeast of Sammamish as the crow flies.
At 41 feet it is on the modest side for Washington, where the typical waterfall with a recorded height stands around 82 feet; it ranks 682nd of 941. The tallest single drop is 18 feet. The water comes down as a slide, where the water glides down a smooth, inclined rock surface, combined with a cascade character. It falls in 3 drops.
The North Cascades are a wilderness of jagged peaks, glaciers and deep, forested valleys of western hemlock, silver fir and Douglas fir, with some of the heaviest snowfall in the country. Meltwater from glaciers and snowfields pours down thousands of feet of cliffs in countless cascades and horsetail falls. Denny Creek carries 4 recorded waterfalls; the biggest of them reaches 171 feet.
There are 236 recorded waterfalls in King County. Lower Denny Creek Cascades, a 52-foot slide cascade waterfall, is under a mile away. Keekwulee Falls, a 171-foot tiered plunge waterfall, is under a mile away. Snowshoe Falls, a 150-foot tiered cascade waterfall, is under a mile away.
Upper Denny Creek Cascades is located at 47.4263° N, 121.4520° 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.