Chasm Falls is a 15-foot waterfall on Ouzel Creek in Teton County, Wyoming, in the Middle Rockies region. It lies about 27.8 miles south of West Yellowstone and roughly 77.1 miles northeast of Idaho Falls as the crow flies.
At 15 feet it is on the modest side for Wyoming, where the typical waterfall with a recorded height stands around 60 feet; it ranks 204th of 230. By form it is a plunge, where the water drops vertically and loses contact with the rock face.
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. Ouzel Creek carries 4 recorded waterfalls; the biggest of them reaches 235 feet.
Teton County holds 121 recorded waterfalls, and several are close by. Emerald Pool Falls, a 15-foot plunge waterfall, is under a mile away. Purgatory Falls, a 90-foot tiered waterfall, is under a mile away. Graceful Falls, a 25-foot cascade waterfall, is about 2.3 miles away.
Chasm Falls is located at 44.2732° N, 110.9634° 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.