Lemhi River near Lemhi, ID

Central Idaho (Salmon River) · USGS gauge 13305000 · Updated Oct 25, 11:23 AM PDT · USGS data, provisional

Fishable/Floatable211 cfs● steady (-4% in 24 h)

Reading time: Oct 25, 11:00 AM 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
25th percentile
Typical range (25th–75th)
212–301 cfs
Median for this date
259 cfs
7-day low / high
145 / 251 cfs

Water temperature & gage height

Gage height (stage)
3.99 ft as of Oct 25, 11:00 AM PDT · USGS 00065 · Provisional

Context only: these readings do not affect the status above, which is based on flow (cfs) alone. Gage height is the water level above this gauge's own reference point, not water depth, and can't be compared between gauges. Temperature converted from °C to °F by Flowcast. Source: USGS, provisional data.

Plain-language explanation

Lemhi River near Lemhi is flowing at 211 cubic feet per second (cfs) as of Oct 25, 11:00 AM PDT. That is on the low side for this time of year: lower than about 75% of the daily flows this gauge has recorded for this date (give or take 7 days) over 68 years of record (1938–2026).

The middle half of those historical flows runs from 212 to 301 cfs, with a median of 259 cfs; the lowest 10% of days are at or below 168 cfs and the highest 10% at or above 341 cfs.

Over the last 24 hours the flow has been steady (-3.7%). In the last 7 days it ranged from 145 to 251 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 Lemhi River near Lemhi fishable today?

Flowcast's status for the Lemhi River near Lemhi is “Fishable/Floatable”: flow is 211 cfs, within the range this gauge normally sees at this time of year, at the 25th percentile for this date (as of Oct 25, 11:00 AM 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 Lemhi River near Lemhi?

211 cubic feet per second at USGS gauge 13305000 as of Oct 25, 11:00 AM PDT, provisional data.

Is the Lemhi River near Lemhi too high or too low right now?

Neither: it is inside the typical range for the date (212 to 301 cfs).

Is the Lemhi River near Lemhi rising or falling?

Over the last 24 hours the flow has been steady (-3.7%).

What is a normal flow for the Lemhi River near Lemhi in October?

For this date (give or take 7 days) the median is 259 cfs and the middle half of days runs 212 to 301 cfs, over 68 years of USGS record.

7-day trend

typical range for this date (25th-75th pct)129164198232267Mon 10/19Tue 10/20Wed 10/21Thu 10/22Fri 10/23Sat 10/24Sun 10/25

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
Mon Oct 1915311thFishable/Floatable
Tue Oct 2015511thFishable/Floatable
Wed Oct 2115710thFishable/Floatable
Thu Oct 221559thToo low
Fri Oct 2320323rdFishable/Floatable
Sat Oct 2422935thFishable/Floatable
Sun Oct 25 (so far)21628thFishable/Floatable

Seasonal context

1020501002005001,000JanFebMarAprMayJunJulAugSepOctNovDec

Shaded band: 10th–90th percentile of daily flows through the year; dashed line: median. Log scale. Dot: today's flow. Based on 68 years of USGS daily data (1938–2026).

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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-13305000
USGS name
Lemhi River Nr Lemhi Id
Drainage area
897 sq mi
Location
44.9400, -113.6392
Record in this analysis
1938–2026
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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