Gallatin River above Deer Creek, near Big Sky, MT
Gallatin County, Montana · USGS 06043120
Latest observation
What this gauge represents: This gauge measures conditions on Gallatin River at its USGS monitoring location in Gallatin County; conditions elsewhere on the waterway may differ.
Observed · 25 minutes ago
Observed
Observed
How to read these numbers
How much water moves past the gauge each second. Higher numbers mean more water is moving downstream.
The water-surface height at this gauge. It is useful for tracking rises, falls and flood thresholds, but it is not the river's total depth.
How much the latest reading has risen or fallen compared with roughly 24 hours earlier.
The typical streamflow for this date based on USGS historical statistics. A multiple such as 3× means current flow is about three times the historical median.
Get Water Data's plain-language summary of current flow, historical context and recent direction.
Official action and flood thresholds where available. These levels are specific to each gauge location.
Gauge height and flood stage are station-specific. A 12-foot reading at one gauge should not be directly compared with 12 feet at another.
Below historical median · Steady
Streamflow is currently 241 ft³/s, 21% below the historical median for this date. Flow has been relatively steady over the past 24 hours.
USGS-reported historical daily median for 09-27: 307 ft³/s · Based on USGS day-of-year statistics
How trends & context are calculated →Streamflow trend
Daily mean streamflow · Aug 28–Sep 25 · dates shown in UTC · 29 observations
Look at the data (29 rows)
| Date (UTC) | Daily mean |
|---|---|
| Aug 28, 2026, 12:00 AM | 284 CFS |
| Aug 29, 2026, 12:00 AM | 310 CFS |
| Aug 30, 2026, 12:00 AM | 317 CFS |
| Aug 31, 2026, 12:00 AM | 300 CFS |
| Sep 1, 2026, 12:00 AM | 284 CFS |
| Sep 2, 2026, 12:00 AM | 290 CFS |
| Sep 3, 2026, 12:00 AM | 275 CFS |
| Sep 4, 2026, 12:00 AM | 268 CFS |
| Sep 5, 2026, 12:00 AM | 261 CFS |
| Sep 6, 2026, 12:00 AM | 258 CFS |
| Sep 7, 2026, 12:00 AM | 256 CFS |
| Sep 8, 2026, 12:00 AM | 253 CFS |
| Sep 9, 2026, 12:00 AM | 251 CFS |
| Sep 10, 2026, 12:00 AM | 248 CFS |
| Sep 11, 2026, 12:00 AM | 247 CFS |
| Sep 12, 2026, 12:00 AM | 246 CFS |
| Sep 13, 2026, 12:00 AM | 243 CFS |
| Sep 14, 2026, 12:00 AM | 245 CFS |
| Sep 15, 2026, 12:00 AM | 243 CFS |
| Sep 16, 2026, 12:00 AM | 241 CFS |
| Sep 17, 2026, 12:00 AM | 243 CFS |
| Sep 18, 2026, 12:00 AM | 252 CFS |
| Sep 19, 2026, 12:00 AM | 304 CFS |
| Sep 20, 2026, 12:00 AM | 282 CFS |
| Sep 21, 2026, 12:00 AM | 256 CFS |
| Sep 22, 2026, 12:00 AM | 249 CFS |
| Sep 23, 2026, 12:00 AM | 273 CFS |
| Sep 24, 2026, 12:00 AM | 256 CFS |
| Sep 25, 2026, 12:00 AM | 246 CFS |
About this gauge
Official USGS station
Get Water Data organizes provisional public monitoring data from the U.S. Geological Survey.
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