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.

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6 USGS gauges near your location (within 30 miles)

Sun River bl Willow Cr nr Augusta MT

USGS 06082200

Caution: High water: fish the edges; wading risky

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

Discharge: 185 ft³/s
Gauge height: 2.15 ft

Much 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, 5:15 PM MST	185	2.15
Nov 5, 4:15 PM MST	185	2.15
Nov 5, 3:15 PM MST	189	2.16
Nov 5, 2:15 PM MST	185	2.15
Nov 5, 1:15 PM MST	185	2.15
Nov 5, 12:15 PM MST	189	2.16
Nov 5, 11:15 AM MST	189	2.16
Nov 5, 10:15 AM MST	189	2.16
Nov 5, 9:15 AM MST	189	2.16
Nov 5, 8:15 AM MST	189	2.16
Nov 5, 7:15 AM MST	185	2.15
Nov 5, 6:15 AM MST	185	2.15
Nov 5, 5:15 AM MST	185	2.15
Nov 5, 4:15 AM MST	185	2.15
Nov 5, 3:15 AM MST	185	2.15
Nov 5, 2:15 AM MST	185	2.15
Nov 5, 1:15 AM MST	181	2.14
Nov 5, 12:15 AM MST	185	2.15
Nov 4, 11:15 PM MST	185	2.15
Nov 4, 10:15 PM MST	185	2.15
Nov 4, 9:15 PM MST	185	2.15
Nov 4, 8:15 PM MST	185	2.15
Nov 4, 7:15 PM MST	189	2.16
Nov 4, 6:15 PM MST	189	2.16
Nov 4, 5:15 PM MST	185	2.15
Nov 4, 4:15 PM MST	185	2.15
Nov 4, 3:15 PM MST	189	2.16

Reading Nov 5, 5:15 PM MST · checked 6:21 PM MST

Open full screen USGS NWS

On our page for Sun River

10.5 miles away in a straight line

Sun River bl Diversion Dam nr Augusta MT
USGS 06080900
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS
On our page for Sun River
11.2 miles away in a straight line
Teton River bl South Fork nr Choteau MT
USGS 06102500
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS NWS
15.3 miles away in a straight line

North Fork Sun River near Augusta MT

USGS 06078500

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

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

Discharge: 83.7 ft³/s
Gauge height: 3.33 ft

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, 5:30 PM MST	83.7	3.33
Nov 5, 4:30 PM MST	82.3	3.32
Nov 5, 3:30 PM MST	80.9	3.31
Nov 5, 2:30 PM MST	82.3	3.32
Nov 5, 1:30 PM MST	83.7	3.33
Nov 5, 12:30 PM MST	82.3	3.32
Nov 5, 11:30 AM MST	83.7	3.33
Nov 5, 10:30 AM MST	74.2	3.26
Nov 5, 9:30 AM MST	82.3	3.32
Nov 5, 8:30 AM MST	80.9	3.31
Nov 4, 6:00 PM MST	83.7	–
Nov 4, 5:00 PM MST	83.7	–
Nov 4, 4:00 PM MST	80.9	–

Reading Nov 5, 5:30 PM MST · checked 6:21 PM MST

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South Fork Sun River near Augusta MT

USGS 06079000

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

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

Discharge: 90.5 ft³/s
Gauge height: 1.2 ft

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, 5:15 PM MST	90.5	1.2
Nov 5, 4:15 PM MST	90.5	1.2
Nov 5, 3:15 PM MST	90.5	1.2
Nov 5, 2:15 PM MST	90.5	1.2
Nov 5, 1:15 PM MST	90.5	1.2
Nov 5, 12:15 PM MST	90.5	1.2
Nov 5, 11:15 AM MST	90.5	1.2
Nov 5, 10:15 AM MST	90.5	1.2
Nov 5, 9:15 AM MST	90.5	1.2
Nov 5, 8:15 AM MST	90.5	1.2
Nov 5, 7:15 AM MST	90.5	1.2
Nov 5, 6:15 AM MST	90.5	1.2
Nov 5, 5:15 AM MST	90.5	1.2
Nov 5, 4:15 AM MST	90.5	1.2
Nov 5, 3:15 AM MST	90.5	1.2
Nov 5, 2:15 AM MST	90.5	1.2
Nov 5, 1:15 AM MST	90.5	1.2
Nov 5, 12:15 AM MST	90.5	1.2
Nov 4, 11:15 PM MST	90.5	1.2
Nov 4, 10:15 PM MST	90.5	1.2
Nov 4, 9:15 PM MST	90.5	1.2
Nov 4, 8:15 PM MST	90.5	1.2
Nov 4, 7:15 PM MST	90.5	1.2
Nov 4, 6:15 PM MST	90.5	1.2
Nov 4, 5:15 PM MST	90.5	1.2
Nov 4, 4:15 PM MST	90.5	1.2
Nov 4, 3:15 PM MST	90.5	1.2

Sun River at Simms MT

USGS 06085800

Caution: High water: fish the edges; wading risky

The full view adds the NWS forecast.

Discharge: 276 ft³/s
Gauge height: 2.81 ft
Water temp: 41.9°F

Much above 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)	Water temp (°F)
Nov 5, 5:30 PM MST	276	2.81	41.9
Nov 5, 4:30 PM MST	270	2.8	42.1
Nov 5, 3:30 PM MST	270	2.8	41.9
Nov 5, 2:30 PM MST	270	2.8	41.5
Nov 5, 1:30 PM MST	270	2.8	41.2
Nov 5, 12:30 PM MST	270	2.8	40.5
Nov 5, 11:30 AM MST	270	2.8	40.1
Nov 5, 10:30 AM MST	276	2.81	39.2
Nov 5, 9:30 AM MST	276	2.81	39
Nov 5, 8:30 AM MST	276	2.81	38.7
Nov 5, 7:30 AM MST	270	2.8	38.8
Nov 5, 6:30 AM MST	276	2.81	39.2
Nov 5, 5:30 AM MST	276	2.81	39.4
Nov 5, 4:30 AM MST	276	2.81	39.6
Nov 5, 3:30 AM MST	276	2.81	39.9
Nov 5, 2:30 AM MST	276	2.81	40.1
Nov 5, 1:30 AM MST	276	2.81	40.3
Nov 5, 12:30 AM MST	276	2.81	40.3
Nov 4, 11:30 PM MST	276	2.81	40.6
Nov 4, 10:30 PM MST	276	2.81	41
Nov 4, 9:30 PM MST	282	2.82	41.4
Nov 4, 8:30 PM MST	276	2.81	41.7
Nov 4, 7:30 PM MST	282	2.82	42.1
Nov 4, 6:30 PM MST	282	2.82	42.4
Nov 4, 5:30 PM MST	282	2.82	42.8
Nov 4, 4:30 PM MST	276	2.81	43.2
Nov 4, 3:30 PM MST	270	2.8	43.2

Checked Nov 5, 6:21 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.

Sun River bl Willow Cr nr Augusta MT
USGS 06082200 · MT · live flow · gauge height · 10.5 mi
Reading the gauge…
Sun River bl Diversion Dam nr Augusta MT
USGS 06080900 · MT · live flow · gauge height · 11.2 mi
Reading the gauge…
Teton River bl South Fork nr Choteau MT
USGS 06102500 · MT · live flow · gauge height · 15.3 mi
Reading the gauge…
North Fork Sun River near Augusta MT
USGS 06078500 · MT · live flow · gauge height · 18.3 mi
Reading the gauge…
South Fork Sun River near Augusta MT
USGS 06079000 · MT · live flow · gauge height · 18.7 mi
Reading the gauge…
Sun River at Simms MT
USGS 06085800 · MT · live flow · gauge height · water temperature · 28.1 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.