Boulder Falls is a 40-foot waterfall on Boulder River in Snohomish County, Washington, in the North Cascades region. It lies about 10.4 miles west of Darrington and roughly 21 miles northeast of Marysville as the crow flies.
At 40 feet it is on the modest side for Washington, where the typical waterfall with a recorded height stands around 82 feet; it ranks 685th of 941. By form it is a cascade, descending over a series of rock steps rather than in a single drop.
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. Boulder River carries 3 recorded waterfalls, and Boulder Falls is the tallest of them.
Snohomish County holds 224 recorded waterfalls, and several are close by. Waterfall 10 mi W of Darrington, is under a mile away. Feature Show Falls, a 259-foot segmented horsetail waterfall, is under a mile away. Half Mile Falls, is about 1.4 miles away.
Boulder Falls is located at 48.2466° N, 121.8275° 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.