Twin Sisters Fire

Judith Basin County, Montana · Wildfire

Contained Official numbers updated Oct 8, 2026 (about 2 hours ago)

First reported about 3 months ago

Metric	Last report	Now	Change
Size	86 acres Aug 1, 5:00 PM	92 acres Oct 8, 1:00 PM +6 acres was 86 acres · Aug 1, 5:00 PM	+6 acres in 2 months
Containment	95% Aug 1, 5:00 PM	100% Oct 8, 1:00 PM +5 percent was 95% · Aug 1, 5:00 PM	+5 percent in 2 months
Crew size	107 Aug 1, 5:00 PM	69 Oct 8, 1:00 PM −38 was 107 · Aug 1, 5:00 PM	−38 in 2 months
Money spent	$1.3M Aug 1, 5:00 PM	$1.5M Oct 8, 1:00 PM +$222,104 was $1.3M · Aug 1, 5:00 PM	+$222,104 in 2 months

Twin Sisters Fire summary

The Twin Sisters Fire is a wildfire near Judith Basin County, Montana. It has burned about 92 acres (about 70 football fields). Crews have it fully contained, with a line all the way around it. It was first reported about 3 months ago. About 69 people are on it, run by a Type 3 IC. We're also tracking 2 other active fires within about 75 miles.

Size: 92 acres
Containment: 100%
Discovered: July 25, 2026 (first reported about 3 months ago)
Cause: Not reported

The size and containment above are current as of Thursday, October 8th at 1:00 p.m. CDT.

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Weather & fire-spread conditions

⚠️ Red Flag Warning in effect. The National Weather Service has flagged conditions here — usually wind plus dry air — that can make fires spread fast. This is the official warning that fire danger is high right now.

Hot, dry, and windy weather can help a fire grow; cool, calm, or wet weather helps crews. The tags below rate each day for fire spread — green is calm, red can push a fire.

A general fire-weather guide (wind matters most, then how dry it is, then heat), not a prediction of what a specific fire will do.

	Day	Night
Today	66°F · Sunny Wind 6 to 10 mph NNW · 0% rain Wind: Breezy Heat: Cool Dry	51°F · Mostly Cloudy Wind 5 to 18 mph SW · 0% rain Wind: Breezy Heat: Cool Dry
Friday	69°F · Partly Sunny Wind 17 to 22 mph WSW · 0% rain Wind: Windy Heat: Cool Dry	38°F · Mostly Cloudy Wind 8 mph WNW · 7% rain Wind: Calm Heat: Cool Dry
Saturday	40°F · Rain And Snow Wind 8 to 15 mph N · 81% rain Wind: Breezy Heat: Cool Rain likely	—

Forecast from the National Weather Service (weather.gov), pulled Thursday, October 8th at 1:02 p.m. CDT.

Could this fire move fast?

Weather isn't the only thing that changes how a fire moves. The ground matters too: how steep it is, and what's growing on it. These four numbers are for the exact spot where this fire started, not the whole fire. A big fire crosses a lot of different ground.

10° slope

Fire usually moves faster uphill than downhill. Heat and flame lean uphill, drying out the ground above the fire before it gets there.

Shrub (SH2)

Shrubs and dead shrub litter, about a foot deep, no grass. Fire moves slow, with short flames.

0% tree canopy cover

The more tree cover above a fire, the easier it is for the fire to climb from the ground into the treetops. That's called a crown fire. Crown fires move faster, throw embers farther ahead of the fire, and are harder for crews to stop head-on.

7,385 ft elevation

Elevation by itself doesn't make a fire more or less dangerous. But it shapes the other three numbers here: what grows there, how dry things get, and what the weather does.

Elevation and slope from the USGS 3D Elevation Program; fuel type and canopy cover from LANDFIRE (USGS and U.S. Forest Service), pulled Thursday, October 8th at 12:04 p.m. CDT.

Who's on it

About 69 people are assigned to this fire, run by a Type 3 IC. The government rates it a Type 3 Incident. About $2 million has been spent on it so far.

The official feed reports the total headcount, not a breakdown by crew type.

Where to get live updates

We show the daily official picture. For minute-by-minute updates, evacuation orders, and maps, these do it best:

→ Watch Duty: real-time fire reporting and evacuations.
→ InciWeb: the government's official fire information site.

Nearby fires to Twin Sisters Fire

Within about 75 miles we're tracking 2 other active fires, closest first:

See all active fires in Montana →

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