Madison River below Hebgen Lake near Grayling Mount
USGS Site No: 06038500 • Madison River • Gallatin County, MT
Madison River below Hebgen Lake near Grayling Mount on the Madison River is currently at 455 cfs (Very Low — 7th percentile for this date) . Gage height: 1.21 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 | 673 | Today: 455 cfs |
| 25th | Low threshold | 865 | |
| 50th (Median) | Normal (median) | 1,130 | |
| 75th | High threshold | 1,740 | |
| 95th | Very High threshold | 2,280 |
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 | 469 | — |
| May 27, 2026 | 494 | — |
| May 26, 2026 | 494 | — |
| May 25, 2026 | 494 | — |
| May 24, 2026 | 472 | — |
| May 23, 2026 | 454 | — |
| May 22, 2026 | 455 | — |
| May 21, 2026 | 452 | — |
| May 20, 2026 | 449 | — |
| May 19, 2026 | 429 | — |
| May 18, 2026 | 394 | — |
| May 17, 2026 | 383 | — |
| May 16, 2026 | 383 | — |
| May 15, 2026 | 383 | — |
| Apr 20, 2026 | 665 | — |
| Apr 19, 2026 | 665 | — |
| Apr 18, 2026 | 665 | — |
| Apr 17, 2026 | 665 | — |
| Apr 16, 2026 | 665 | — |
| Apr 15, 2026 | 665 | — |
| Apr 14, 2026 | 665 | — |
| Apr 13, 2026 | 665 | — |
| Apr 12, 2026 | 665 | — |
| Apr 11, 2026 | 665 | — |
| Apr 10, 2026 | 665 | — |
| Apr 9, 2026 | 665 | — |
| Apr 8, 2026 | 665 | — |
| Apr 7, 2026 | 665 | — |
| Apr 6, 2026 | 665 | — |
| Apr 5, 2026 | 664 | — |
Station Information
- USGS Site No
- 06038500
- State
- MT
- County
- Gallatin County
- Coordinates
- 44.8664, -111.3388
- Drainage Area
- 931 mi²
- Datum (ft)
- 6,448.5
- HUC Code
- 10020007
Recent Extremes
- Max discharge
-
1,200 cfsJul 15, 2025
- Min discharge
-
383 cfsMay 17, 2026
Computed from the local daily-values archive.
Nearby Gauges
-
Madison River at Kirby Ranch near Cameron MountNormal12.0 mi · 920 cfs
-
Henrys Fork near Lake IDNormal18.8 mi · 20 cfs
-
Madison River Near West Yellowstone, MountHigh19.6 mi · 479 cfs
-
Red Rock Creek above Lakes, near Lakeview, MountVery High22.3 mi · 64 cfs
-
Gibbon River at Madison Jct, YnpHigh28.2 mi · 107 cfs