USGS Streamgage 06205000
Stillwater River near Absarokee, MT
Stillwater River near Absarokee, MT is USGS streamgage 06205000 in Montana, monitoring river discharge in hydrologic subbasin 10070005. It drains a watershed of about 936 square miles. Discharge records at this site go back to 1910. Typical flow runs near 2,085.2 cfs in July and 379.2 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- Montana
- Drainage area
- 936 sq mi
- Gauge elevation
- 3,957 ft
- Subbasin (HUC-8)
- 10070005
- Coordinates
- 45.53674, -109.42206
- USGS site number
- 06205000
- Records begin
- 1910-08-01 (116 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Stillwater River near Absarokee, 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 |
|---|---|---|---|---|
| 330 | 356 | 380 | ||
| 322 | 356 | 391 | ||
| 311 | 349 | 391 | ||
| 301 | 342 | 389 | ||
| 292 | 336 | 385 | ||
| 284 | 331 | 384 | ||
| 277 | 326 | 378 | ||
| 265 | 316 | 372 | ||
| 258 | 311 | 372 | ||
| 251 | 306 | 371 | ||
| 249 | 306 | 377 | ||
| 245 | 303 | 376 | ||
| 241 | 299 | 371 | ||
| 236 | 296 | 372 |
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 91 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 | 189.3 | 284.7 | 403.3 | |
| February | 181.1 | 265.7 | 377.6 | |
| March | 197.5 | 266.4 | 420.3 | |
| April | 234.5 | 379.2 | 687 | |
| May | 683.1 | 1,369.9 | 2,674.2 | |
| June | 1,660.7 | 3,209 | 5,707.7 | |
| July | 986.1 | 2,085.2 | 3,702.6 | |
| August | 452.1 | 779.5 | 1,274.6 | |
| September | 338.5 | 536.1 | 897.4 | |
| October | 342.5 | 509 | 714.3 | |
| November | 306.3 | 413.4 | 532.3 | |
| December | 226.2 | 323.2 | 433.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Stillwater River near Absarokee, MT normally run highest?
- June, on the long-term record. The median daily flow that month is about 3,209 cfs, against 265.7 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Stillwater River near Absarokee, MT?
- It depends on the month. In January, half of days historically fall near 284.7 cfs, with the middle 80% of days between 189.3 and 403.3 cfs. The month-by-month table on this page gives the full range.
- How long has Stillwater River near Absarokee, MT been measured?
- Discharge records at USGS site 06205000 begin in 1910, about 116 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Stillwater River near Absarokee, 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. A companion model forecasts each day's water-temperature high and low. 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 Stillwater River near Absarokee, MT?
- The gauge sits at 45.53674, -109.42206, in Montana, in hydrologic subbasin 10070005, at an elevation of about 3,957 feet, draining roughly 936 square miles.
- Can I use Stillwater River near Absarokee, 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.