Benham Falls is a 30-foot waterfall on Benham Creek in Lewis County, Washington, in the Cascades region. It lies about 17.9 miles southeast of Morton and roughly 53.6 miles south of South Hill as the crow flies.
At 30 feet it is on the modest side for Washington, where the typical waterfall with a recorded height stands around 82 feet; it ranks 766th of 941. The tallest single drop is 20 feet. By form it is a tiered waterfall, falling in several distinct steps one after another, combined with a horsetail character. It falls in 2 drops.
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.
Lewis County holds 180 recorded waterfalls, and several are close by. Strawberry Mountain Falls, a 250-foot tiered horsetail waterfall, is about 3.1 miles away. Middle Quartz Creek Falls, a 96-foot cascade waterfall, is about 3.6 miles away. Lower Quartz Creek Falls, a 40-foot tiered horsetail waterfall, is about 3.6 miles away.
Benham Falls is located at 46.3891° N, 121.9913° 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.