A small USGS stream gaging station with an antenna on its roof under a cloudy evening sky

Check a river’s flow.

Search any USGS stream gauge by river or station name, by state, or near you. Each card shows the latest flow and how it compares with the normal range for today’s date; open a gauge for the full picture: trend, water temperature and what it means for trout, safety and the official NWS flood stage.

Flow rate checkerSwitch tool

Your browser will ask before sharing your location. It is used once, rounded to about a kilometre, to list gauges within 30 miles, and is not stored.

7 USGS gauges near your location (within 30 miles)

West Fork Bitterroot River nr Conner MT

USGS 12342500

Caution: Low water: go quiet and stealthy

No water temperature here. The full view adds the NWS forecast.

Discharge: 57.5 ft³/s
Gauge height: 1.12 ft

Much below normal for Nov 5 Steady · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)
Nov 5, 7:15 PM MST	57.5	1.12
Nov 5, 6:15 PM MST	57.5	1.12
Nov 5, 5:15 PM MST	57.5	1.12
Nov 5, 4:15 PM MST	57.5	1.12
Nov 5, 3:15 PM MST	57.5	1.12
Nov 5, 2:15 PM MST	57.5	1.12
Nov 5, 1:15 PM MST	57.5	1.12
Nov 5, 12:15 PM MST	57.5	1.12
Nov 5, 11:15 AM MST	57.5	1.12
Nov 5, 10:15 AM MST	57.5	1.12
Nov 5, 9:15 AM MST	57.5	1.12
Nov 5, 8:15 AM MST	57.5	1.12
Nov 5, 7:15 AM MST	57.5	1.12
Nov 5, 6:15 AM MST	57.5	1.12
Nov 5, 5:15 AM MST	57.5	1.12
Nov 5, 4:15 AM MST	57.5	1.12
Nov 5, 3:15 AM MST	57.5	1.12
Nov 5, 2:15 AM MST	57.5	1.12
Nov 5, 1:15 AM MST	57.5	1.12
Nov 5, 12:15 AM MST	57.5	1.12
Nov 4, 11:15 PM MST	57.5	1.12
Nov 4, 10:15 PM MST	57.5	1.12
Nov 4, 9:15 PM MST	57.5	1.12
Nov 4, 8:15 PM MST	57.5	1.12
Nov 4, 7:15 PM MST	57.5	1.12
Nov 4, 6:15 PM MST	57.5	1.12
Nov 4, 5:15 PM MST	57.5	1.12

Reading Nov 5, 7:15 PM MST · checked 7:36 PM MST

Open full screen USGS NWS

On our page for West Fork Bitterroot River

1.8 miles away in a straight line

Bitterroot River near Darby MT

USGS 12344000

Limited data: Normal flow for the date: no water temperature here

No water temperature here. The full view adds the NWS forecast.

Discharge: 237 ft³/s
Gauge height: 1.73 ft

Below normal for Nov 5 Steady · 24 h Below NWS action stage

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)
Nov 5, 7:15 PM MST	237	1.73
Nov 5, 6:15 PM MST	237	1.73
Nov 5, 5:15 PM MST	240	1.74
Nov 5, 4:15 PM MST	240	1.74
Nov 5, 3:15 PM MST	240	1.74
Nov 5, 2:15 PM MST	240	1.74
Nov 5, 1:15 PM MST	240	1.74
Nov 5, 12:15 PM MST	240	1.74
Nov 5, 11:15 AM MST	240	1.74
Nov 5, 10:15 AM MST	240	1.74
Nov 5, 9:15 AM MST	240	1.74
Nov 5, 8:15 AM MST	240	1.74
Nov 5, 7:15 AM MST	240	1.74
Nov 5, 6:15 AM MST	240	1.74
Nov 5, 5:15 AM MST	240	1.74
Nov 5, 4:15 AM MST	240	1.74
Nov 5, 3:15 AM MST	240	1.74
Nov 5, 2:15 AM MST	240	1.74
Nov 5, 1:15 AM MST	244	1.75
Nov 5, 12:15 AM MST	244	1.75
Nov 4, 11:15 PM MST	244	1.75
Nov 4, 10:15 PM MST	244	1.75
Nov 4, 9:15 PM MST	244	1.75
Nov 4, 8:15 PM MST	244	1.75
Nov 4, 7:15 PM MST	244	1.75
Nov 4, 6:15 PM MST	247	1.76
Nov 4, 5:15 PM MST	247	1.76

NF SALMON RIVER AT NORTH FORK ID

USGS 13306000

Limited data: Normal flow for the date: no water temperature here

No water temperature here.

Discharge: 48.6 ft³/s
Gauge height: 4.08 ft

Above normal for Nov 5 Steady · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)
Nov 5, 6:30 PM MST	48.6	4.08
Nov 5, 5:30 PM MST	48.6	4.08
Nov 5, 4:30 PM MST	48.6	4.08
Nov 5, 3:30 PM MST	48.6	4.08
Nov 5, 2:30 PM MST	48.6	4.08
Nov 5, 1:30 PM MST	48.6	4.08
Nov 5, 12:30 PM MST	48.6	4.08
Nov 5, 11:30 AM MST	47.2	4.07
Nov 5, 10:30 AM MST	48.6	4.08
Nov 5, 9:30 AM MST	48.6	4.08
Nov 5, 8:30 AM MST	50.1	4.09
Nov 5, 7:30 AM MST	48.6	4.08
Nov 5, 6:30 AM MST	50.1	4.09
Nov 5, 5:30 AM MST	48.6	4.08
Nov 5, 4:30 AM MST	48.6	4.08
Nov 5, 3:30 AM MST	50.1	4.09
Nov 5, 2:30 AM MST	48.6	4.08
Nov 5, 1:30 AM MST	48.6	4.08
Nov 5, 12:30 AM MST	48.6	4.08
Nov 4, 11:30 PM MST	50.1	4.09
Nov 4, 10:30 PM MST	48.6	4.08
Nov 4, 9:30 PM MST	50.1	4.09
Nov 4, 8:30 PM MST	48.6	4.08
Nov 4, 7:30 PM MST	48.6	4.08
Nov 4, 6:30 PM MST	50.1	4.09
Nov 4, 5:30 PM MST	48.6	4.08
Nov 4, 4:30 PM MST	48.6	4.08

Lake Como Spillway near Darby, MT
USGS 12344501
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS
25.5 miles away in a straight line
Rock Cr bl canal diversion, near Darby, MT
USGS 12345510
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS
25.7 miles away in a straight line
Bitterroot Irrigation District Canal nr Darby, MT
USGS 12345500
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS
25.9 miles away in a straight line

SALMON RIVER NR SHOUP ID

USGS 13307000

Good: Good trout conditions: fish normally

Discharge: 1,740 ft³/s
Gauge height: 2.5 ft
Water temp: 43.3°F

Below normal for Nov 5 Steady · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 6:30 PM MST	1,740	2.5	43.3
Nov 5, 5:30 PM MST	1,740	2.5	43.2
Nov 5, 4:30 PM MST	1,740	2.5	43
Nov 5, 3:30 PM MST	1,730	2.49	43
Nov 5, 2:30 PM MST	1,730	2.49	43
Nov 5, 1:30 PM MST	1,730	2.49	43.2
Nov 5, 12:30 PM MST	1,730	2.49	43
Nov 5, 11:30 AM MST	1,740	2.5	42.8
Nov 5, 10:30 AM MST	1,730	2.49	42.8
Nov 5, 9:30 AM MST	1,740	2.5	42.8
Nov 5, 8:30 AM MST	1,740	2.5	42.8
Nov 5, 7:30 AM MST	1,740	2.5	42.8
Nov 5, 6:30 AM MST	1,740	2.5	42.8
Nov 5, 5:30 AM MST	1,750	2.51	42.6
Nov 5, 4:30 AM MST	1,750	2.51	42.4
Nov 5, 3:30 AM MST	1,750	2.51	42.3
Nov 5, 2:30 AM MST	1,750	2.51	42.3
Nov 5, 1:30 AM MST	1,760	2.52	42.3
Nov 5, 12:30 AM MST	1,760	2.52	42.4
Nov 4, 11:30 PM MST	1,760	2.52	43
Nov 4, 10:30 PM MST	1,750	2.51	43.3
Nov 4, 9:30 PM MST	1,760	2.52	43.7
Nov 4, 8:30 PM MST	1,760	2.52	43.9
Nov 4, 7:30 PM MST	1,760	2.52	43.9
Nov 4, 6:30 PM MST	1,780	2.53	43.7
Nov 4, 5:30 PM MST	1,780	2.53	43.3
Nov 4, 4:30 PM MST	1,760	2.52	43.3

Checked Nov 5, 7:36 PM MST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.

West Fork Bitterroot River nr Conner MT
USGS 12342500 · MT · live flow · gauge height · 1.8 mi
Reading the gauge…
Bitterroot River near Darby MT
USGS 12344000 · MT · live flow · gauge height · water temperature · 20.1 mi
Reading the gauge…
NF SALMON RIVER AT NORTH FORK ID
USGS 13306000 · ID · flow record ended · gauge height · 24.9 mi
Reading the gauge…
Lake Como Spillway near Darby, MT
USGS 12344501 · MT · live flow · gauge height · 25.5 mi
Reading the gauge…
Rock Cr bl canal diversion, near Darby, MT
USGS 12345510 · MT · live flow · gauge height · 25.7 mi
Reading the gauge…
Bitterroot Irrigation District Canal nr Darby, MT
USGS 12345500 · MT · live flow · gauge height · 25.9 mi
Reading the gauge…
SALMON RIVER NR SHOUP ID
USGS 13307000 · ID · live flow · gauge height · water temperature · 27.1 mi
Reading the gauge…

Quick picks: our 2,852 waters by state

Each state opens its USGS gauges and our water pages there; a water opens the live cards for its gauges, or the NOAA tides for flats and surf.

Search covers 11,178 USGS stream gauges that reported discharge, gauge height or water temperature in the 183 days before 2026-10-23 (USGS series catalog); readings are fetched live when a gauge is shown.

Where these numbers come from

Discharge, gauge height, water temperature and water quality: U.S. Geological Survey readings (provisional, can be revised), cached for 15 minutes. Where USGS publishes a gauge’s flow only once a day, the latest daily mean is shown with its date.
Normal range: the 25th to 75th percentile of daily mean flow for the same calendar day over the gauge’s record (USGS daily statistics), classed as USGS does (hyswap).
Temperature guidance for trout quotes the gauge’s own state fish and wildlife agency; where we found none, it says so and quotes federal guidance (National Park Service, U.S. Fish and Wildlife Service). Cold-water safety quotes the NWS; dissolved oxygen and pH are read against EPA criteria. Each line names its source.
Flood stage and forecasts: the National Weather Service’s National Water Prediction Service and its Turn Around Don’t Drown guidance. Tides: NOAA Tides & Currents.

General guidance, not a fishing forecast, a safety guarantee or a statement about access. Planning a trip? The trip planner shows these readings on every day you fish a water.