"This fire is notable for its rapid containment—achieving 100% containment within 13 days—despite covering over 340 acres. The relatively low estimated cost and minimal fire behavior suggest effective resource deployment and favorable conditions."
The Brown Reservoir wildfire, located in Custer County, Montana, was first reported on August 6, 2026, covering 340.2 acres. The fire was caused by natural factors and is managed by an unspecified jurisdictional agency. By August 19, 2026, the blaze had been fully contained (100%) with minimal fire behavior reported. The incident remained active until deactivation on August 16, 2026, and the estimated cost to control the fire was $10,000. The timeline shows no change in acreage between the initial report and final containment, indicating that the fire did not spread after the initial assessment.
Official source description: 28 Miles E from Miles City, MT
Minimal
The fire is currently fully contained with minimal behavior; however, general wildfire safety precautions remain advised in the area.
IRWIN ID: {78B12F53-84CB-4637-A527-E9CDBF09A6CB}
Discovered: Jul 28, 2026
Cause: Natural
Est. Cost to Date: $10,000
Coordinates: 46.3753, -105.2678
Other wildfires that have recently been contained or dropped from official tracking in MT.
The Brown Reservoir Fire has burned 340 acres as of August 19, 2026.
Yes, the Brown Reservoir Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Brown Reservoir Fire is burning in Custer, MT.
No, the Brown Reservoir Fire is no longer listed as active by NIFC.
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