Henrys Fork at St. Anthony, ID

Eastern Idaho (Henrys Fork & Snake) · USGS gauge 13050500 · Updated Oct 24, 2:37 PM PDT · USGS data, provisional

All 3 Henrys Fork gauges in Idaho

Fishable/Floatable1,370 cfs▲ rising (+48% 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
58th percentile
Typical range (25th–75th)
1,040–1,650 cfs
Median for this date
1,290 cfs
7-day low / high
766 / 1,370 cfs

Plain-language explanation

Henrys Fork at St. Anthony is flowing at 1,370 cubic feet per second (cfs) as of Oct 24, 1:45 PM PDT. That is in the normal range for this time of year: higher than about 58% of the daily flows this gauge has recorded for this date (give or take 7 days) over 77 years of record (1919–2026).

The middle half of those historical flows runs from 1,040 to 1,650 cfs, with a median of 1,290 cfs; the lowest 10% of days are at or below 845 cfs and the highest 10% at or above 2,007 cfs.

Over the last 24 hours the flow has been rising (+48.4%). In the last 7 days it ranged from 766 to 1,370 cfs.

Why this status: Flow is within the range this gauge normally sees at this time of year (or the deviation is too small in absolute terms to matter).

Quick answers

Is the Henrys Fork at St. Anthony fishable today?

Flowcast's status for the Henrys Fork at St. Anthony is “Fishable/Floatable”: flow is 1,370 cfs, within the range this gauge normally sees at this time of year, at the 58th 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 Henrys Fork at St. Anthony?

1,370 cubic feet per second at USGS gauge 13050500 as of Oct 24, 1:45 PM PDT, provisional data.

Is the Henrys Fork at St. Anthony too high or too low right now?

Neither: it is inside the typical range for the date (1,040 to 1,650 cfs).

Is the Henrys Fork at St. Anthony rising or falling?

Over the last 24 hours the flow has been rising (+48.4%).

What is a normal flow for the Henrys Fork at St. Anthony in October?

For this date (give or take 7 days) the median is 1,290 cfs and the middle half of days runs 1,040 to 1,650 cfs, over 77 years of USGS record.

7-day trend

typical range for this date (25th-75th pct)6758721,0681,2641,461Sun 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 188199thToo low
Mon Oct 198239thToo low
Tue Oct 2084011thFishable/Floatable
Wed Oct 2185213thFishable/Floatable
Thu Oct 2286913thFishable/Floatable
Fri Oct 2393916thFishable/Floatable
Sat Oct 24 (so far)1,17638thFishable/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 77 years of USGS daily data (1919–2026).

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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-13050500
USGS name
Henrys Fork At St Anthony Id
Drainage area
1,770 sq mi
Location
43.9669, -111.6725
Record in this analysis
1919–2026
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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Eastern Idaho: Henrys Fork & Snake River

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