Total streamflow across the
Ruby River
was last observed at
113
cfs, and is expected to yield approximately
224
acre-ft of water today; about 52%
of normal.
River levels are low and may signify a drought.
Average streamflow for this time of year is
216 cfs,
with recent peaks last observed
on
2011-07-01 when daily discharge volume was observed at
3,719 cfs.
Maximum discharge along the river is currently at the
Ruby River Near Twin Bridges Mt
reporting a streamflow rate of 156 cfs.
However, the streamgauge with the highest stage along the river is the
Ruby River Ab Reservoir Nr Alder Mt
with a gauge stage of 2.98 ft.
This river is monitored from 3 different streamgauging stations along the Ruby River, the highest being situated at an altitude of 5,410 ft, the
Ruby River Ab Reservoir Nr Alder Mt.
| Last Updated | 2025-12-01 |
| Discharge Volume | 224 ACRE-FT |
| Streamflow |
113.0 cfs
+2.0 cfs (+1.8%) |
| Percent of Normal | 52.38% |
| Maximum |
3,719.0 cfs
2011-07-01 |
| Seasonal Avg | 216 cfs |
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Ruby River Ab Reservoir Nr Alder Mt
USGS 06019500 |
113 cfs | 2.98 ft | 1.8 | |||||
|
Ruby River Bl Reservoir Nr Alder Mt
USGS 06020600 |
43 cfs | 2.24 ft | -2.29 | |||||
|
Ruby River Near Twin Bridges Mt
USGS 06023000 |
156 cfs | 2.78 ft | -1.89 |
The Ruby River is a tributary of the Beaverhead River, approximately 76 mi (122 km) long, in southwestern Montana in the United States. It rises in the Beaverhead National Forest in southwestern Madison County between the Snowcrest Range and the Gravelly Range. It flows north through the Ruby River Reservoir, past Alder, then northwest, flowing between the Tobacco Root Mountains to the northeast and the Ruby Range to the southwest. It joins the Beaverhead near Twin Bridges. The Beaverhead becomes the Jefferson River 2 mi (3.2 km) downstream where it joins the Big Hole River.
The river has also been known by these various names: Pah-mamar-roi, Pak-sam-ma-oi, Pashmaroi, Passamari, Philanthropy River, Stinking Water Creek, Stinking Water River, Stinkingwater River.The Ruby is a Class II river for stream access for recreational purposes.