Yaak River near Troy, MT
Northwest Montana (Flathead & Kootenai) · USGS gauge 12304500 · Updated Oct 24, 2:37 PM PDT · USGS data, provisional
Reading time: Oct 24, 1:45 PM PDT · Provisional data
Flow is far below normal for the date. Expect shallow riffles and slower water; some stretches may be hard to float and fish can be stressed by low flows. Check local reports for the specific stretch.
- Vs. normal for this date
- 5th percentile
- Typical range (25th–75th)
- 125–206 cfs
- Median for this date
- 162 cfs
- 7-day low / high
- 81.2 / 87.4 cfs
Plain-language explanation
Yaak River near Troy is flowing at 87.4 cubic feet per second (cfs) as of Oct 24, 1:45 PM PDT. That is among the lowest flows on record for this time of year: lower than about 95% of the daily flows this gauge has recorded for this date (give or take 7 days) over 71 years of record (1956–2026).
The middle half of those historical flows runs from 125 to 206 cfs, with a median of 162 cfs; the lowest 10% of days are at or below 102 cfs and the highest 10% at or above 287 cfs.
Over the last 24 hours the flow has been steady (+2.5%). In the last 7 days it ranged from 81.2 to 87.4 cfs.
Why this status: Flow is at or below the seasonal 10th percentile and in the lower 40% of all days on record.
Quick answers
Is the Yaak River near Troy fishable today?
Flowcast's status for the Yaak River near Troy is “Too low”: flow is 87.4 cfs, well below normal for the date, at the 5th percentile for this date (as of Oct 24, 1:45 PM PDT). That describes flow only. It says nothing about water clarity, temperature, fish activity, access or fishing regulations.
What is the current flow of the Yaak River near Troy?
87.4 cubic feet per second at USGS gauge 12304500 as of Oct 24, 1:45 PM PDT, provisional data.
Is the Yaak River near Troy too high or too low right now?
It is on the low side: below the typical range for the date (125 to 206 cfs).
Is the Yaak River near Troy rising or falling?
Over the last 24 hours the flow has been steady (+2.5%).
What is a normal flow for the Yaak River near Troy in October?
For this date (give or take 7 days) the median is 162 cfs and the middle half of days runs 125 to 206 cfs, over 71 years of USGS record.
7-day trend
Hourly flow in cfs, Pacific time. The shaded band is the typical range (25th–75th percentile) for this date, shown when it falls within the chart.
| Day (Pacific) | Mean cfs | Percentile | Status that day |
|---|---|---|---|
| Sun Oct 18 | 81.5 | 4th | Too low |
| Mon Oct 19 | 81.2 | 3rd | Too low |
| Tue Oct 20 | 81.2 | 3rd | Too low |
| Wed Oct 21 | 81.2 | 3rd | Too low |
| Thu Oct 22 | 81.1 | 2nd | Too low |
| Fri Oct 23 | 84.4 | 4th | Too low |
| Sat Oct 24 (so far) | 87.1 | 5th | Too low |
Seasonal context
Shaded band: 10th–90th percentile of daily flows through the year; dashed line: median. Log scale. Dot: today's flow. Based on 71 years of USGS daily data (1956–2026).
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Official resources
- USGS site page for gauge 12304500 (USGS: live readings, history, station details)
- Montana fishing regulations (FWP)
- Montana aquatic invasive species (FWP)
- Montana fishing access sites (FWP)
Links go to the agencies' own websites and were checked as working. Flowcast does not summarize fishing or boating rules: regulations and closures change, and the agency pages are the authority.
About this gauge
- USGS site
- USGS-12304500
- USGS name
- Yaak River Near Troy Mt
- Drainage area
- 792 sq mi
- Location
- 48.5617, -115.9702
- Record in this analysis
- 1956–2026
Nearby gauges
- Kootenai River below Libby Dam, near Libby, MT Fishable/Floatable 4,240 cfs · about 32 mi away (straight line)
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