Gallatin River at Logan Mount
USGS Site No: 06052500 • Gallatin River • Gallatin County, MT
Gallatin River at Logan Mount on the Gallatin River is currently at 1,620 cfs (Very High — 99th percentile for this date) . Gage height: 6.18 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 576 | |
| 25th | Low threshold | 634 | |
| 50th (Median) | Normal (median) | 763 | |
| 75th | High threshold | 921 | |
| 95th | Very High threshold | 1,140 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 1,300 | — |
| May 27, 2026 | 1,100 | — |
| May 26, 2026 | 874 | — |
| May 25, 2026 | 741 | — |
| May 24, 2026 | 711 | — |
| May 23, 2026 | 743 | — |
| May 22, 2026 | 829 | — |
| May 21, 2026 | 845 | — |
| May 20, 2026 | 887 | — |
| May 19, 2026 | 1,010 | — |
| May 18, 2026 | 1,160 | — |
| May 17, 2026 | 1,230 | — |
| May 16, 2026 | 1,240 | — |
| May 15, 2026 | 1,400 | — |
| Apr 20, 2026 | 773 | — |
| Apr 19, 2026 | 785 | — |
| Apr 18, 2026 | 789 | — |
| Apr 17, 2026 | 835 | — |
| Apr 16, 2026 | 827 | — |
| Apr 15, 2026 | 776 | — |
| Apr 14, 2026 | 866 | — |
| Apr 13, 2026 | 934 | — |
| Apr 12, 2026 | 891 | — |
| Apr 11, 2026 | 868 | — |
| Apr 10, 2026 | 876 | — |
| Apr 9, 2026 | 887 | — |
| Apr 8, 2026 | 864 | — |
| Apr 7, 2026 | 842 | — |
| Apr 6, 2026 | 841 | — |
| Apr 5, 2026 | 854 | — |
Station Information
- USGS Site No
- 06052500
- State
- MT
- County
- Gallatin County
- Coordinates
- 45.8862, -111.4420
- Drainage Area
- 1,789 mi²
- Datum (ft)
- 4,086.4
- HUC Code
- 10020008
Flood Stage Thresholds
- Action Stage
- 8.0 ft
- Flood Stage
- 9.0 ft
- Moderate Flood
- 10.0 ft
- Major Flood
- 11.0 ft
Currently 2.82 ft below flood stage.
Recent Extremes
- Max discharge
-
4,220 cfsJun 2, 2025
- Min discharge
-
275 cfsJul 14, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Jefferson River Near Three Forks MountNormal7.4 mi · 1,760 cfs
-
Missouri River at Toston MountNormal18.0 mi · 4,230 cfs
-
Willow Creek Near Harrison MountLow18.3 mi · 13 cfs
-
Madison River Near Norris MountUnknown20.3 mi · 1,440 cfs
-
East Gallatin River above Water Reclamation Fa near Bozeman MountVery High21.2 mi · 100 cfs