Mossy Rock Falls is a waterfall on Twentytwo Creek in Snohomish County, Washington, in the North Cascades region, with a total height of about 145 feet. It lies about 9.8 miles east of Granite Falls and roughly 19.5 miles east of Marysville as the crow flies.
At 145 feet it is taller than the typical Washington waterfall of about 82 feet, ranking 298th of 941 with a recorded height. The tallest single drop is 57 feet. The water comes down as a cascade, descending over a series of rock steps rather than in a single drop. It falls in 6 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. Twentytwo Creek carries 5 recorded waterfalls; the biggest of them reaches 225 feet.
There are 224 recorded waterfalls in Snohomish County. Humpback Falls, a 23-foot horsetail waterfall, is under a mile away. Confusion Falls, a 134-foot tiered horsetail waterfall, is under a mile away. Hundred Step Falls, a 225-foot segmented cascade waterfall, is under a mile away.
Mossy Rock Falls is located at 48.0778° N, 121.7564° 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.