Is the Marias River flooding?

Montana · 3 gauges · Montana river levels

The Marias River is tracked by 3 USGS streamgauges in Montana. This page compares each gauge’s live water level against its official National Weather Service flood stage, refreshed every 15 minutes, so you can tell whether the Marias River is running normal, rising toward flood stage, or already flooding. 1 of 3 gauges have both a usable water-level reading and a published minor flood stage. Gauges without a published flood stage show water level and flow only. For nearby rivers, see all Montana river levels.

data refreshed 11 min ago

Readings may be delayed; check each observation time below. This gauge summary does not rule out flooding on unmonitored stretches or nearby streets.

River facts

The longest-running gauge on this river is Marias River near Shelby MT. The highest level ever recorded there was 23.64 ft on 9 June 1964, carrying 241,000 cfs. Peak records there go back to 1902 (119 annual peaks). It is currently at 3.64 ft, 20.0 ft below that record.

Drains 2,716 sq mi · gauge elevation 3,088 ft · source: USGS peak-flow record

GaugeStatusStageFlood stageUpdated
Marias River near Shelby MTNo flooding3.64 ft9 ft
Marias River near Chester MTNo flooding3.38 ft
Marias River near Loma MTNo flood stage defined1.26 ft
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.