Stillwater River Flow
As of 2026-08-10, the Stillwater River is flowing at a combined 482 cfs across 1 USGS streamgauge — 62% of normal for this time of year, versus a seasonal average of 778 cfs.
Total streamflow across the Stillwater River was last observed at 482 cfs, and is expected to yield approximately 956 acre-ft of water today; about 62% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 778 cfs, with recent peaks last observed on 2025-04-06 when daily discharge volume was observed at 23,644 cfs.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Stillwater River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Stillwater River
All 1 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Stillwater River Near Absarokee Mt
MT
USGS 06205000
|
482 | 1.73 | -4.7 | 67% | 180 | 14,800 | 3,880 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Stillwater River
The Stillwater River is located in Montana and is a tributary of the Yellowstone River. The river is approximately 70 miles long and has a rich history dating back to the 1800s when it was used for transportation and irrigation. The river is fed by several small creeks and is known for its crystal-clear water. The river is home to several reservoirs including the Mystic Lake Reservoir and the East Fork Reservoir, which are used for hydroelectric power and irrigation. The river is also a popular destination for recreational activities such as fishing, kayaking, and camping. Additionally, the river is used for agricultural purposes, and many farmers rely on the river to irrigate their crops. Overall, the Stillwater River is a significant resource for the local community and plays a vital role in the economy and environment of the area.
Track the Stillwater River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Stillwater River
How is the Stillwater River flowing right now?
As of 2026-08-10, the Stillwater River is flowing at a combined 482 cfs across its USGS streamgauges, about 62% of normal for this date. The live per-gauge breakdown and 24-hour trend are shown above.
Is the Stillwater River running high or low right now?
Check the percent-of-normal figure on this page: above 100% means the river is running higher than its seasonal average for the date, below 100% means lower. The per-gauge table shows which reaches are highest and lowest.
Where does the data for the Stillwater River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.