Bighorn Lake Yellowtail

Name: Bighorn Lake Yellowtail (Montana) water level
Creator: U.S. Bureau of Reclamation

Montana · Reclamation gauge

Grey bar: 12-month range 3,613.8–3,630.5 ft.

Water level · NAVD88

3,626.48FT

Storage 865,373 acre-feet

The source publishes no % full figure.

7 days +0.26 ft30 days +2.63 ft

Reading for Oct 24, 2026 · page refreshed Oct 25, 21:16 UTC
Source: U.S. Bureau of Reclamation (RISE)

Worth going today?This Afternoon

Looks good

Light wind, dry

Wind5 to 8 mph

Rain0%

Temp47°F

Level3,626.5 ft

This AfternoonSunny · 47°F
NE 5 to 8 mph · rain 0%

TonightPartly Cloudy · 34°F
NNE 3 mph · rain 3%

NWS forecast for the gauge location. Good = wind ≤ 10 mph and rain ≤ 30%; storms are flagged. Not safety advice – check local conditions, closures and warnings.

Level history

30 days1 year

Field notes

As of Oct 24, 2026, Bighorn Lake Yellowtail stood at 3,626.48 (NAVD88) ft.

Reclamation reports storage of 865,373 acre-feet for the same day.

Over the past 7 days the lake has been rising (+0.26 ft), and it is +2.63 ft over 30 days.

Readings come from the Bureau of Reclamation's daily reservoir data for Bighorn Lake Yellowtail Dam and Powerplant.

Lake facts

Storage (latest)	865,373 acre-feet
Gauge / station	Bighorn Lake Yellowtail Dam and Powerplant
Elevation datum	ft (NAVD88)
Gauge location	45.3072, -107.9569

Nearby lakes

Bighorn River2 mi E3,188.57 ft+0.33 ft Buffalo Bill Reservoir82 mi SW · WY5,358.42 ft+0.04 ft South Fork Dike at Buffalo Bill Reservoir86 mi SW · WY5,393.35 ft+0.03 ft Anchor Reservoir121 mi S · WY6,369.45 ft−0.05 ft Boysen Reservoir132 mi S · WY4,711.91 ft+0.76 ft

Common questions

Is Bighorn Lake Yellowtail rising or falling?

Over the last 7 days it changed +0.26 ft and over 30 days +2.63 ft.

How full is Bighorn Lake Yellowtail?

Reclamation publishes the water surface elevation for this gauge but not a percent-full figure, so we don't show one rather than estimate it.

How often is this page updated?

The page is rebuilt automatically every day from Reclamation's published data. Values can be revised later by the source agency.

Where does the data come from?

The U.S. Bureau of Reclamation's RISE data portal (data.usbr.gov). Forecasts come from the National Weather Service.

Daily values published by the Bureau of Reclamation. Reclamation data are provisional and subject to revision unless otherwise noted. This page is not affiliated with or endorsed by the Bureau of Reclamation. See data sources.