Boulder River below Natural Bridge, MT

SWEET GRASS COUNTY, MT45.5554°N, -110.2007°W Updated 5 hr ago

FLOW RATE

103cfs

GAUGE HT

3.70ft

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

103cfs

Optimal band: 93–125 cfs

PERIOD HIGH

157cfs

PERIOD LOW

91cfs

RUNNABLE

74%

last 1 year in band

Gauge Height

3.70ft

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45.5554, -110.2007

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DATA · MT DNRC · NOAA · NWSUPDATED 2026-09-23 00:00 UTC

Site #43BJ 03800·MT DNRC

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