Wyoming · Yellowstone National Park
Union Falls
103 mi from Bozeman · ~3.0 hr drive
No height recorded
Union Falls is a named waterfall in Wyoming — about 103 miles from Bozeman, MT. Full visit details below.
- State
- Wyoming
- Nearest city
- Bozeman, MT · 103 mi · ~3.0 hr drive
- Coordinates
- 44.1924°, -110.8707°
- Park
- Yellowstone National Park (NP)
- County
- Teton
From Wikipedia: Union Falls is a fan-type waterfall on Mountain Ash Creek, a tributary of the Fall River in the Cascade Corner (southwest) of Yellowstone National Park, in Wyoming, United States. With a height of 250 feet (76 m), it is the second tallest major waterfall in Yellowstone, exceeded only by the lower Yellowstone Falls. The falls was named by members of the Arnold Hague Geological Surveys sometime between 1884 and 1886. Geologist J.P. Iddings claims the name derives from the fact that a tributary of Mountain Ash Creek joins at the very brink of the falls, thus Union Falls. Access to the falls is via the Mountain Ash Creek trail and the Grassy Lake Road. Excerpt from the Wikipedia article on Union Falls, available under CC BY-SA 4.0.
About Yellowstone National Park
Union Falls is inside Yellowstone National Park, a U.S. National Park managed by the National Park Service. Conditions, road status, trail closures, and reservation requirements are published directly on the park's NPS page — check it before driving in, especially in winter or during major weather events.
Entrance fee: $35 per vehicle. Per vehicle, valid 7 days. Combined Yellowstone + Grand Teton pass available. An America the Beautiful annual pass ($80) covers entrance to all NPS units and is worth it after ~3 park visits per year.
Park homepage: https://www.nps.gov/yell/
Visiting Union Falls
The exact location is at 44.1924°, -110.8707° — open in Google Maps for driving directions from your location.
Before you go: check current conditions with the appropriate land manager — state parks department, U.S. Forest Service ranger district, or National Park Service unit. Trail access, parking, water levels, and seasonal closures all vary. Several waterfalls in our database are seasonal and may run dry between mid-summer and the next rainy season.
If you've visited Union Falls and have current notes (parking situation, dog policy, seasonality, kid-friendliness), tell us at /contact — we update pages as we learn more.
Other waterfalls within 30 miles
Sources
Location and tag data for Union Falls comes from OpenStreetMap contributors (ODbL license) ; the Wikipedia article linked above provides additional history. We do not modify the underlying data — this page presents what's already publicly recorded. To suggest corrections, see our methodology page or contact us.