Rivermatics

USGS Streamgage 06288400

Bighorn River at Two Leggins Bridge, near Hardin

Bighorn River at Two Leggins Bridge, near Hardin is USGS streamgage 06288400 in Montana, monitoring river discharge in hydrologic subbasin 10080015. It sits on the Bighorn River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 20,614 square miles. Discharge records at this site go back to 2012. Typical flow runs near 3,363.2 cfs in July and 3,373.7 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

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Gauge details

State
Montana
Drainage area
20,614 sq mi
Gauge elevation
2,937 ft
Subbasin (HUC-8)
10080015
Coordinates
45.64409, -107.65822
USGS site number
06288400
Records begin
2012-04-01 (14 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Bighorn River at Two Leggins Bridge, near Hardin. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
1,379 1,405 1,430
1,357 1,403 1,457
1,334 1,400 1,486
1,321 1,399 1,506
1,308 1,401 1,530
1,296 1,402 1,544
1,303 1,416 1,560
1,305 1,429 1,618
1,300 1,432 1,629
1,291 1,433 1,641
1,281 1,431 1,644
1,265 1,422 1,636
1,251 1,419 1,651
1,240 1,413 1,644

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 13 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 2,077.4 2,648.4 3,671.9
February 1,988.9 2,743.1 4,154.3
March 1,922.3 3,085.5 7,015.5
April 1,825 3,373.7 9,686
May 1,623.9 3,592.3 11,171
June 1,534 4,288.7 14,140
July 1,539 3,363.2 10,467.1
August 1,483.2 2,152.9 3,598.1
September 1,452.7 2,279.3 3,718.3
October 1,682.9 2,805.8 4,516.5
November 1,901.3 2,681.7 4,114.7
December 2,022.6 2,656.8 3,746.8

All values in cubic feet per second (cfs).

Common questions

When does Bighorn River at Two Leggins Bridge, near Hardin normally run highest?
June, on the long-term record. The median daily flow that month is about 4,288.7 cfs, against 2,152.9 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Bighorn River at Two Leggins Bridge, near Hardin?
It depends on the month. In January, half of days historically fall near 2,648.4 cfs, with the middle 80% of days between 2,077.4 and 3,671.9 cfs. The month-by-month table on this page gives the full range.
How long has Bighorn River at Two Leggins Bridge, near Hardin been measured?
Discharge records at USGS site 06288400 begin in 2012, about 14 years, covering roughly 5,228 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Bighorn River at Two Leggins Bridge, near Hardin?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow 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 the live gauge screen. Open live conditions to see the current outlook.
Where is Bighorn River at Two Leggins Bridge, near Hardin?
The gauge sits at 45.64409, -107.65822, in Montana, in hydrologic subbasin 10080015, at an elevation of about 2,937 feet, draining roughly 20,614 square miles.
Can I use Bighorn River at Two Leggins Bridge, near Hardin 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.

Upstream and downstream on the Bighorn River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Bighorn River in full.

Other gauges in this subbasin