What is the current flow on Gallatin River?

Gallatin River was running 513 cubic feet per second as of Aug 1, 2026, 6:00 PM UTC, measured at USGS gauge 06043500. This is a build-time snapshot rather than a live reading — check the USGS gauge directly before relying on it.

What is the water temperature on Gallatin River?

69.6°F (20.9°C) as of Aug 1, 2026, 6:00 PM UTC, at USGS gauge 06052500. Gallatin River carries no state trout classification, so the trout-stress thresholds do not apply to it — this is a water temperature measurement, not a fishery judgement.

Gallatin River

Montana. Streamflow and water-temperature readings from USGS gauges. Running 513 cfs as of Aug 1, 2026, 6:00 PM UTC.

Latest Reading

513

cubic feet / second

69.6°F

water temperature (20.9°C)

USGS gauges

Flow measured Aug 1, 2026, 6:00 PM UTC at gauge 06043500. Temperature measured Aug 1, 2026, 6:00 PM UTC at gauge 06052500. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on Gallatin River

Gauge	Station	Water temp?
06043120	Gallatin River above Deer Creek, near Big Sky, MT	Yes
06043500	Gallatin River near Gallatin Gateway, MT	—
06052500	Gallatin River at Logan MT	Yes

Fly fishing rivers →Montana trout water →Montana lakes →

Conditions: USGS NWIS (public domain).