"This fire is notable for its rapid initial spread to 400 acres within a week of discovery, highlighting the potential for natural fires to expand quickly in the region. The BIA’s involvement underscores the importance of federal resources in managing fires on tribal lands."
The 313 MM 13 wildfire was discovered on September 14, 2026, in Big Horn County, Montana, and is currently active. As of the latest update on September 22, the fire has burned 400 acres with no containment reported. The incident is classified as a natural fire and is being managed by the Bureau of Indian Affairs (BIA). No additional growth or containment data is available beyond the initial 400-acre figure. The fire remains in the early stages of development with no reported changes in size or containment since its discovery.
Good air quality. Outdoor activity is generally safe near this incident.
Nearest reporting station: Billings. Source: AirNow.gov (EPA).
General wildfire safety guidance applies: stay informed about local fire conditions, follow any evacuation orders, and keep a safe distance from the fire perimeter.
IRWIN ID: {CCFFE67A-AAD8-4453-8B30-413D0B2B2990}
Discovered: Sep 14, 2026
Cause: Natural
Managing Agency: BIA
Coordinates: 45.5609, -107.6915
Other wildfires that have recently been contained or dropped from official tracking in MT.
The 313 MM 13 Fire has burned 400 acres as of September 22, 2026.
The 313 MM 13 Fire has not yet reached any official containment.
The official cause has been listed as: Natural.
The 313 MM 13 Fire is burning in Big Horn, MT.
Yes, as of the latest official update, the 313 MM 13 Fire remains active.
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