Yellowstone River at Billings Mount
USGS Site No: 06214500 • Yellowstone River • Yellowstone County, MT
Yellowstone River at Billings Mount on the Yellowstone River is currently at 21,900 cfs (Very High — 124th percentile for this date) . Gage height: 7.66 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 | 2,850 | |
| 25th | Low threshold | 3,270 | |
| 50th (Median) | Normal (median) | 3,880 | |
| 75th | High threshold | 4,510 | |
| 95th | Very High threshold | 5,590 |
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 | 16,600 | — |
| May 27, 2026 | 12,700 | — |
| May 26, 2026 | 9,430 | — |
| May 25, 2026 | 7,610 | — |
| May 24, 2026 | 7,470 | — |
| May 23, 2026 | 7,910 | — |
| May 22, 2026 | 8,410 | — |
| May 21, 2026 | 8,610 | — |
| May 20, 2026 | 8,910 | — |
| May 19, 2026 | 10,100 | — |
| May 18, 2026 | 11,600 | — |
| May 17, 2026 | 13,400 | — |
| May 16, 2026 | 15,800 | — |
| May 15, 2026 | 19,000 | — |
| Apr 20, 2026 | 5,120 | — |
| Apr 19, 2026 | 5,420 | — |
| Apr 18, 2026 | 5,890 | — |
| Apr 17, 2026 | 6,050 | — |
| Apr 16, 2026 | 6,200 | — |
| Apr 15, 2026 | 6,620 | — |
| Apr 14, 2026 | 7,040 | — |
| Apr 13, 2026 | 7,030 | — |
| Apr 12, 2026 | 6,510 | — |
| Apr 11, 2026 | 6,050 | — |
| Apr 10, 2026 | 5,730 | — |
| Apr 9, 2026 | 5,280 | — |
| Apr 8, 2026 | 4,930 | — |
| Apr 7, 2026 | 4,750 | — |
| Apr 6, 2026 | 4,800 | — |
| Apr 5, 2026 | 5,100 | — |
Station Information
- USGS Site No
- 06214500
- State
- MT
- County
- Yellowstone County
- Coordinates
- 45.8001, -108.4680
- Drainage Area
- 11,807 mi²
- Datum (ft)
- 3,081.7
- HUC Code
- 100700041006
Flood Stage Thresholds
- Action Stage
- 12.5 ft
- Flood Stage
- 13.5 ft
- Moderate Flood
- 14.5 ft
- Major Flood
- 15.0 ft
Currently 5.84 ft below flood stage.
Recent Extremes
- Max discharge
-
37,600 cfsJun 3, 2025
- Min discharge
-
1,870 cfsAug 27, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
White Horse Canal Near Silesia MountVery High26.3 mi · 30 cfs
-
Clarks Fork Yellowstone River at Edgar MountVery High29.4 mi · 5,430 cfs
- Unknown
-
Bighorn River at Two Leggins Bridge, Near HardinVery Low40.5 mi · 1,180 cfs
-
Musselshell River above Big Coulee Creek at Lavina MountVery High40.6 mi · 232 cfs