Williamson River below Sprague River, near Chiloquin, OR

Southern Oregon · USGS gauge 11502500 · Updated Oct 24, 2:37 PM PDT · USGS data, provisional

Fishable/Floatable533 cfs● steady (+1% in 24 h)

Reading time: Oct 24, 1:45 PM PDT · Provisional data

Flow is in a typical range for the date. Rivers are generally easiest to fish and float when they are near their normal flow, but this status says nothing about water clarity, hatches, hazards such as wood in the river, or dam releases.

Vs. normal for this date
10th percentile
Typical range (25th–75th)
567–678 cfs
Median for this date
610 cfs
7-day low / high
524 / 543 cfs

Plain-language explanation

Williamson River below Sprague River, near Chiloquin is flowing at 533 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 90% of the daily flows this gauge has recorded for this date (give or take 7 days) over 109 years of record (1917–2026).

The middle half of those historical flows runs from 567 to 678 cfs, with a median of 610 cfs; the lowest 10% of days are at or below 534 cfs and the highest 10% at or above 816 cfs.

Over the last 24 hours the flow has been steady (+0.8%). In the last 7 days it ranged from 524 to 543 cfs.

Why this status: Flow is low for the season by percentile, but within 15% of the seasonal median, so it is treated as normal.

Quick answers

Is the Williamson River below Sprague River, near Chiloquin fishable today?

Flowcast's status for the Williamson River below Sprague River, near Chiloquin is “Fishable/Floatable”: flow is 533 cfs, within the range this gauge normally sees at this time of year, at the 10th 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 Williamson River below Sprague River, near Chiloquin?

533 cubic feet per second at USGS gauge 11502500 as of Oct 24, 1:45 PM PDT, provisional data.

Is the Williamson River below Sprague River, near Chiloquin too high or too low right now?

Neither: it is inside the typical range for the date (567 to 678 cfs).

Is the Williamson River below Sprague River, near Chiloquin rising or falling?

Over the last 24 hours the flow has been steady (+0.8%).

What is a normal flow for the Williamson River below Sprague River, near Chiloquin in October?

For this date (give or take 7 days) the median is 610 cfs and the middle half of days runs 567 to 678 cfs, over 109 years of USGS record.

7-day trend

513523534544554Sun 10/18Mon 10/19Tue 10/20Wed 10/21Thu 10/22Fri 10/23Sat 10/24

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 cfsPercentileStatus that day
Sun Oct 1852713thFishable/Floatable
Mon Oct 1952410thFishable/Floatable
Tue Oct 205249thFishable/Floatable
Wed Oct 215249thFishable/Floatable
Thu Oct 2253512thFishable/Floatable
Fri Oct 2353311thFishable/Floatable
Sat Oct 24 (so far)53310thFishable/Floatable

Seasonal context

1002005001,0002,0005,00010,000JanFebMarAprMayJunJulAugSepOctNovDec

Shaded band: 10th–90th percentile of daily flows through the year; dashed line: median. Log scale. Dot: today's flow. Based on 109 years of USGS daily data (1917–2026).

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Official resources

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-11502500
USGS name
Williamson River Blw Sprague River Nr Chiloquin,Or
Drainage area
3,030 sq mi
Location
42.5644, -121.8797
Record in this analysis
1917–2026
Data from the U.S. Geological Survey (USGS). Readings are provisional and subject to revision. Flowcast statuses are automated comparisons with each gauge's own history, not safety ratings or fishing reports. Check local conditions, weather, regulations and closures before you go. Rivers can change quickly.

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