Boulder River at Big Timber MT

Sweet Grass County, Montana · USGS gauge 06200000 · NWS BTMM8 · Boulder River flood status · Montana river levels

Is Boulder River at Big Timber MT flooding right now?

Boulder River at Big Timber MT measured 0.98 ft on 2026-09-11 01:00:00 UTC. That observation was 7.0 ft below its 8 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height

0.98 ft

as of 64 min ago

Streamflow

74 cfs

data refreshed 1 min ago

Minor flooding here begins at 8 ft. The highest crest on record was 9 ft on Thu, Jun 5, 1997.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

Category	Stage	Current distance
Minor flood	8 ft	7.0 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

Stage	Date
9 ft	1997-06-05
8.56 ft	2022-06-13
8.33 ft	2020-06-01
8.25 ft	1975-07-08
8.04 ft	2011-06-30

Last 7 days

Past 7 days · 0.98–1.08 ft

Nearby gauges

Gauge	Distance	County
East Boulder River below Dry Fork Creek near Mcleod, MT	23.3 mi	Sweet Grass County
Shields River near Livingston MT	26.8 mi	Park County
Dugout Creek at mouth, near Wilsall, MT	32.2 mi	Meagher County
Stillwater River near Absarokee, MT	32.2 mi	Stillwater County
Yellowstone River near Livingston, MT	34.3 mi	Park County

Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast