"This fire is notable for its rapid transition from an uncontained 320-acre blaze to full containment within a two-week period, demonstrating effective firefighting response and minimal impact on surrounding communities."
The Bartholomew Reservoir wildfire, located in Custer County, Montana, was discovered on August 3, 2026, and reported to have burned 320.16 acres by August 6, 2026. The fire, caused by natural factors, remained uncontained until August 19, 2026, when it was reported as 100% contained with minimal fire behavior. Over the course of the incident, the acreage remained steady at 320.16 acres, while containment progressed from unknown to full containment. The incident was deactivated on August 17, 2026, and the jurisdictional agency was not specified.
Official source description: 46 Miles SE from Miles City, MT
Minimal
With the fire now fully contained and exhibiting minimal behavior, general wildfire safety precautions remain advised, but no immediate evacuation or shelter-in-place orders are necessary.
IRWIN ID: {E9097D0A-F8E7-40CF-8F53-FB0D39604AB0}
Discovered: Aug 3, 2026
Cause: Natural
Est. Cost to Date: $10,000
Coordinates: 46.1721, -104.8936
Other wildfires that have recently been contained or dropped from official tracking in MT.
The Bartholomew Reservoir Fire has burned 320 acres as of August 19, 2026.
Yes, the Bartholomew Reservoir Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Bartholomew Reservoir Fire is burning in Custer, MT.
No, the Bartholomew Reservoir Fire is no longer listed as active by NIFC.
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