Gros Ventre River River Levels

Last Updated: December 4, 2025

The Gros Ventre River is a tributary of the Snake River, located in western Wyoming.


Summary

Total streamflow across the Gros Ventre River was last observed at 195 cfs, and is expected to yield approximately 387 acre-ft of water today; about 25% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 788 cfs, with recent peaks last observed on 2011-07-01 when daily discharge volume was observed at 8,710 cfs.

Maximum discharge along the river is currently at the Gros Ventre River At Kelly Wy reporting a streamflow rate of 149 cfs. However, the streamgauge with the highest stage along the river is the Gros Ventre River At Zenith Wy with a gauge stage of 18.04 ft. This river is monitored from 2 different streamgauging stations along the Gros Ventre River, the highest being situated at an altitude of 6,650 ft, the Gros Ventre River At Kelly Wy.

River Details

Last Updated 2025-11-04
Discharge Volume 387 ACRE-FT
Streamflow 195.0 cfs
-3.0 cfs (-1.52%)
Percent of Normal 24.76%
Maximum 8,710.0 cfs
2011-07-01
Seasonal Avg 788 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Gros Ventre River At Kelly Wy
USGS 13014500
149 cfs 3.66 ft 5.67
Gros Ventre River At Zenith Wy
USGS 13015000
54 cfs 18.04 ft -2.19
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Gros Ventre (English: ; from French: "big belly"), also known as the Aaniiih, A'aninin, Haaninin, and Atsina, are a historically Algonquian-speaking Native American tribe located in north central Montana. Today the Gros Ventre people are enrolled in the Fort Belknap Indian Community of the Fort Belknap Reservation of Montana, a federally recognized tribe with 3,682 enrolled members, that also includes Assiniboine people or Nakoda people, the Gros Ventre's historical enemies. The Fort Belknap Indian Reservation is in the northernmost part of Montana, just south of the small town of Harlem, Montana.