Lower Foss River Falls is a 251-foot waterfall on West Fork Foss River in King County, Washington, in the North Cascades region. It lies about 22 miles northeast of Tanner and roughly 35.8 miles east of Sammamish as the crow flies.
At 251 feet it stands in the tallest quarter of Washington’s 941 waterfalls with a recorded height, ranking 153rd; the typical Washington waterfall is about 82 feet. The tallest single drop is 96 feet. By form it is a tiered waterfall, falling in several distinct steps one after another, combined with a horsetail 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.
King County holds 236 recorded waterfalls, and several are close by. Upper Foss River Falls, a 337-foot tiered cascade waterfall, is under a mile away. Lower Copper Falls, a 67-foot slide cascade waterfall, is under a mile away. Middle Copper Falls, a 72-foot tiered cascade waterfall, is under a mile away.
Lower Foss River Falls is located at 47.6037° N, 121.3139° 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.