Hamma Hamma Falls is an 82-foot waterfall on Hamma Hamma River in Mason County, Washington, in the Coast Range region. It lies about 20.6 miles west of Seabeck and roughly 40.3 miles northwest of Olympia as the crow flies.
At 82 feet it is taller than the typical Washington waterfall of about 82 feet, ranking 468th of 941 with a recorded height. The tallest single drop is 66 feet. By form it is a tiered waterfall, falling in several distinct steps one after another, combined with a plunge character. It falls in 2 drops.
The Coast Range is a belt of steep, deeply dissected hills along the Pacific, wrapped in dense temperate rainforest of Douglas fir, western hemlock, Sitka spruce and red alder. Heavy winter rain feeds short, fast creeks lined with ferns, salmonberry and moss that drop steeply toward the ocean or the Columbia. Hamma Hamma River carries 4 recorded waterfalls, and Hamma Hamma Falls is the tallest of them.
Mason County holds 42 recorded waterfalls, and several are close by. Lower Whitehorse Falls, is under a mile away. Waterfall 21.5 mi W of Seabeck, is under a mile away. Middle Whitehorse Falls, is about 1 miles away.
Hamma Hamma Falls is located at 47.5755° N, 123.2604° 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.