Marckworth Falls is a 15-foot waterfall on Youngs Creek in Snohomish County, Washington, in the Puget Lowland region. It lies about 3.8 miles south of Sultan and roughly 16.5 miles northeast of Sammamish as the crow flies.
At 15 feet it is on the modest side for Washington, where the typical waterfall with a recorded height stands around 82 feet; it ranks 899th of 941. By form it is a cascade, descending over a series of rock steps rather than in a single drop.
The Puget Lowland is a glacially shaped basin of low hills, lakes and wetlands between the Olympics and the Cascades, once covered by Douglas fir and western red cedar and now the most settled part of Washington. Streams here run through terraces of glacial till and outwash, with waterfalls where creeks cut through the deposits. Youngs Creek carries 3 recorded waterfalls; the biggest of them reaches 25 feet.
Snohomish County holds 224 recorded waterfalls, and several are close by. Youngs Creek Falls, a 25-foot tiered plunge waterfall, is under a mile away. Cedar Ponds Falls, is under a mile away. McCoy Creek Falls, a 45-foot horsetail waterfall, is about 2.4 miles away.
Marckworth Falls is located at 47.8083° N, 121.8250° 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.