Rivermatics

3 USGS Streamgages · Mississippi River system

Beaverhead River flows and levels

Beaverhead River is gauged at 3 USGS streamgages in Montana, each tracked by Rivermatics. It feeds the Missouri River. It drains into the Mississippi River system. Drainage area at the gauges ranges from 2,730 square miles at Beaverhead River at Barretts, MT up to 3,618 at Beaverhead River near Twin Bridges, MT. The gauged reach falls about 457 feet, from 5,275 feet down to 4,818. Rivermatics issues a daily machine-learned 14-day flow outlook for every one of them.

Gauges on this river, upstream to downstream

Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.

USGS streamgages on this river, ordered upstream to downstream
Gauge State Drainage sq mi Elevation ft April p50 cfs July p50 cfs Forecast
Beaverhead River at Barretts, MT MT 2,730 5,275 333.8 568.2 14-day
Beaverhead River at Dillon, MT MT 2,892 5,098 170.5 169.7 14-day
Beaverhead River near Twin Bridges, MT MT 3,618 4,818 379.2 138.5 14-day

Typical flow by month at Beaverhead River near Twin Bridges, MT

The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 91 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 195.1 381 534.3
February 205.1 391.5 549.1
March 240 423.9 609.9
April 138.9 379.2 749.7
May 52.6 169.4 660.8
June 47.8 163.4 865.2
July 48.5 138.5 510
August 63.4 146.4 409.1
September 95.8 245.9 644.7
October 164.1 347.6 732.1
November 243.9 484 750
December 214.7 436.2 655.9

All values in cubic feet per second (cfs).

Common questions

When does the Beaverhead River run highest?
November, on the long-term record at Beaverhead River near Twin Bridges, MT — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 484 cfs that month, against 138.5 cfs in July, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
How many gauges are on the Beaverhead River?
Rivermatics tracks 3 USGS streamgages on the Beaverhead River, across Montana. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
Is there a flow forecast for the Beaverhead River?
Yes, at 3 of the 3 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on each gauge's live screen.
What river system is the Beaverhead River part of?
The Beaverhead River drains into the Mississippi River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
Can I use Beaverhead River data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Other rivers in the Mississippi River system

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