Brimstone Cascades is a 100-foot waterfall on South Branch Sulphur Creek in Park County, Wyoming, in the Middle Rockies region. It lies about 33.9 miles east of West Yellowstone and roughly 117.4 miles southwest of Billings as the crow flies.
At 100 feet it is taller than the typical Wyoming waterfall of about 60 feet, ranking 81st of 230 with a recorded height. The tallest single drop is 70 feet. By form it is a tiered waterfall, falling in several distinct steps one after another. It falls in 2 drops.
The Middle Rockies are high, glaciated mountain ranges with alpine peaks, subalpine fir and spruce forest, lodgepole pine and grassy intermontane valleys. Snowmelt streams cascade down glacial valleys and canyon walls.
Park County holds 114 recorded waterfalls, and several are close by. Xanadu Falls, a 150-foot tiered waterfall, is under a mile away. Valkyries, Fall of the, a 15-foot tiered waterfall, is about 1.1 miles away. Twin Falls, 200 feet high, is about 1.1 miles away.
Brimstone Cascades is located at 44.7587° N, 110.4263° 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 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.