Thunder Falls is a waterfall on Summit Creek in Lewis County, Washington, in the Cascades region, with a total height of about 82 feet. It lies about 36 miles east of Eatonville and roughly 45.5 miles southeast of South Hill 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 water comes down as a veiling waterfall, a thin sheet of water spread over the rock face, combined with a horsetail character.
The Cascades are a high volcanic range of snow-capped peaks, deep glacial valleys and dense conifer forest of Douglas fir, western hemlock and true firs, with abundant rain and snow on the western slopes. Basalt cliffs and lava flows give the region one of the highest concentrations of waterfalls in the country. Summit Creek carries 5 recorded waterfalls; the biggest of them reaches 119 feet.
There are 180 recorded waterfalls in Lewis County. Upper Summit Creek Falls, an 18-foot slide cascade waterfall, is under a mile away. Waterfall 36 mi W of Tieton, is about 1 mile away. Fish Ladder Falls, a 119-foot tiered horsetail waterfall, is about 1.4 miles away.
Thunder Falls is located at 46.7103° N, 121.5407° 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.