Lower Hamma Hamma Falls is a 37-foot waterfall on Hamma Hamma River in Mason County, Washington, in the Coast Range region. It lies about 18.8 miles west of Seabeck and roughly 40 miles north of Olympia as the crow flies.
At 37 feet it is on the modest side for Washington, where the typical waterfall with a recorded height stands around 82 feet; it ranks 715th of 941. By form it is a cascade, descending over a series of rock steps rather than in a single drop.
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; the biggest of them reaches 82 feet.
Mason County holds 42 recorded waterfalls, and several are close by. Middle Hamma Hamma Falls, 19 feet high, is under a mile away. Lower Whitehorse Falls, is about 1.2 miles away. Middle Whitehorse Falls, is about 1.7 miles away.
Lower Hamma Hamma Falls is located at 47.5818° N, 123.2233° 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.