Red Flag Warning
2026-04-13T20:00:00-06:00

* AFFECTED AREA...Fire Weather Zones 214, 216, 238, 241, 242, 246 and 247. * TIMING...From 11 AM this morning to 8 PM MDT this evening. * WINDS...Southwest 10 to 20 mph with gusts around 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.

Bighorn River

Last Updated: April 13, 2026

Total streamflow across the Bighorn River was last observed at 5,589 cfs, and is expected to yield approximately 11,086 acre-ft of water today; about 45% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 12,497 cfs, with recent peaks last observed on 2023-06-26 when daily discharge volume was observed at 66,500 cfs.

Maximum discharge along the river is currently at the Bighorn R At Worland Wyo reporting a streamflow rate of 4,350 cfs. However, the streamgauge with the highest stage along the river is the Bighorn River Near St. Xavier with a gauge stage of 59.6 ft. This river is monitored from 5 different streamgauging stations along the Bighorn River, the highest being situated at an altitude of 4,051 ft, the Bighorn R At Worland Wyo.

The Bighorn River is a 461-mile long river that flows through Montana and Wyoming.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-13
Discharge Volume 11,086 ACRE-FT
Streamflow 5,589.0 cfs
Past 24 Hours: -53.0 cfs (-0.94%)
Percent of Normal 44.72%
Maximum 66,500.0 cfs
2023-06-26
Seasonal Avg 12,497 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Bighorn R At Worland Wyo
USGS 06268600
4350 cfs 8.22 ft
Bighorn River At Basin
USGS 06274300
843 cfs 3.16 ft 2.06
Bighorn River At Kane
USGS 06279500
926 cfs 2.01 ft -3.14
Bighorn River Near St. Xavier
USGS 06287000
1740 cfs 59.6 ft 1.16
Bighorn River Ab Tullock Cr Nr Bighorn Mt
USGS 06294500
2080 cfs 1.43 ft -2.8
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Bighorn River is a tributary of the Yellowstone, approximately 461 miles (742 km) long, in the states of Wyoming and Montana in the western United States. The river was named in 1805 by fur trader François Larocque for the bighorn sheep he saw along its banks as he explored the Yellowstone.The upper reaches of the Bighorn, south of the Owl Creek Mountains in Wyoming, are known as the Wind River. The two rivers are sometimes referred to as the Wind/Bighorn. The Wind River officially becomes the Bighorn River at the Wedding of the Waters, on the north side of the Wind River Canyon near the town of Thermopolis. From there, the river flows through the Bighorn Basin in north central Wyoming, passing through Thermopolis and Hot Springs State Park.
At the border with Montana, the river turns northeast, and flows past the north end of the Bighorn Mountains, through the Crow Indian Reservation, where the Yellowtail Dam forms the Bighorn Lake reservoir. The reservoir and the surrounding canyon are part of the Bighorn Canyon National Recreation Area.
The Little Bighorn River joins the Bighorn near the town of Hardin, Montana. Approximately fifty miles farther downriver, the Bighorn River ends where it joins the Yellowstone.