USGS Streamgage 06017000
Beaverhead River at Dillon, MT
Beaverhead River at Dillon, MT is USGS streamgage 06017000 in Montana, monitoring river discharge in hydrologic subbasin 10020002. It sits on the Beaverhead River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 2,892 square miles. Discharge records at this site go back to 1950. Typical flow runs near 169.7 cfs in July and 170.5 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Montana
- Drainage area
- 2,892 sq mi
- Gauge elevation
- 5,098 ft
- Subbasin (HUC-8)
- 10020002
- Coordinates
- 45.21838, -112.65533
- USGS site number
- 06017000
- Records begin
- 1950-10-01 (76 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Beaverhead River at Dillon, MT. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 70.6 | 76.5 | 81.4 | ||
| 67.9 | 76.2 | 86 | ||
| 65.4 | 75.5 | 89.6 | ||
| 62.2 | 75.1 | 91.7 | ||
| 61 | 75.3 | 95.9 | ||
| 59.3 | 75.9 | 98.2 | ||
| 58.2 | 76.8 | 101 | ||
| 59.3 | 78.5 | 110 | ||
| 58.4 | 78.1 | 110 | ||
| 54.9 | 75.8 | 105 | ||
| 56.2 | 77.4 | 111 | ||
| 55.4 | 77.4 | 112 | ||
| 53.4 | 76.3 | 111 | ||
| 52.4 | 75.7 | 110 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 75 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 233.2 | 386.1 | 458 | |
| February | 219 | 385.9 | 535.7 | |
| March | 140.8 | 244.7 | 475.3 | |
| April | 83.9 | 170.5 | 570 | |
| May | 87 | 142.4 | 515.9 | |
| June | 98.5 | 168.5 | 575.7 | |
| July | 108 | 169.7 | 393.7 | |
| August | 113 | 163 | 360.9 | |
| September | 81.8 | 140.7 | 516.6 | |
| October | 95.1 | 152.1 | 523.9 | |
| November | 225.4 | 426.6 | 668.8 | |
| December | 232.5 | 416.5 | 586.4 |
All values in cubic feet per second (cfs).
Common questions
- When does Beaverhead River at Dillon, MT normally run highest?
- November, on the long-term record. The median daily flow that month is about 426.6 cfs, against 140.7 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Beaverhead River at Dillon, MT?
- It depends on the month. In January, half of days historically fall near 386.1 cfs, with the middle 80% of days between 233.2 and 458 cfs. The month-by-month table on this page gives the full range.
- How long has Beaverhead River at Dillon, MT been measured?
- Discharge records at USGS site 06017000 begin in 1950, about 76 years, covering roughly 5,987 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Beaverhead River at Dillon, MT?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Beaverhead River at Dillon, MT?
- The gauge sits at 45.21838, -112.65533, in Montana, in hydrologic subbasin 10020002, at an elevation of about 5,098 feet, draining roughly 2,892 square miles.
- Can I use Beaverhead River at Dillon, MT data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Beaverhead River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Beaverhead River in full.
- Beaverhead River at Barretts, MT 2,730 sq mi
- Beaverhead River at Dillon, MT this page
- Beaverhead River near Twin Bridges, MT 3,618 sq mi