"The Slough Grass wildfire is notable for its rapid growth and the significant resources committed to containing it, with estimated costs reaching $500,000."
The Slough Grass wildfire is located in Rosebud County, Montana, approximately 8 miles northwest of Colstrip. The fire is of natural cause and has been actively burning with torching and spotting behavior. Initially reported on August 6, 2026, the fire grew rapidly, increasing from 400 acres to 6,467.3 acres in the first day. Containment efforts were slow, with only 10% containment by August 7, but the fire was fully contained by August 10, 2026, after three days of active burning. The fire has required significant resources, with estimated costs ranging from $25,000 to $500,000.
Official source description: 8 Miles NW from Colstrip, MT
Minimal; Uphill Runs; Spotting
Given the fire's current minimal behavior, general wildfire safety guidance applies. However, it is essential to remain vigilant and follow local authorities' instructions, as containment status can change rapidly.
IRWIN ID: {A0D9B680-54D9-4943-A878-2D3F0E7A7D22}
Discovered: Aug 6, 2026
Cause: Natural
Managing Agency: DNRC
Est. Cost to Date: $500,000
Coordinates: 45.7525, -106.805
Other wildfires that have recently been contained or dropped from official tracking in MT.
The Slough Grass Fire has burned 5,465 acres as of August 10, 2026.
Yes, the Slough Grass Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Slough Grass Fire is burning in Rosebud, MT.
No, the Slough Grass Fire is no longer listed as active by NIFC.
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