Feed checks and source-record updates do not necessarily mean fire conditions changed. Figures below reflect the last recorded incident report.
The last recorded incident change is more than 14 days old or undated. Historical fire behavior and summaries below are not confirmation of current conditions.
Automated summary generated: Oct 23, 2026 15:45 UTC. It may lag behind the report and is not an official alert.
The Cottonwood Creek wildfire was discovered on September 10, 2026, in Big Horn County, Montana, at 18:37:52. Within the first hour of reporting, the fire had burned 122 acres, and by the following morning it had expanded to 455.5 acres. No containment has been reported, and no personnel or cost estimates are available. The incident remains under the jurisdiction of unspecified agencies, with the cause identified as human. The fire behavior and weather conditions have not been documented in the available reports.
Historical observations from incident reports, not a live forecast. Acreage and containment can decrease when agencies correct their estimates.
2
122 acres
456 acres
Latest available source report: Sep 11, 2026 01:00 UTC. This is the report date, not confirmation of current fire conditions.
Reported acreage increased by 334 acres between the first and last available acreage measurements.
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Sep 10, 2026 19:00 | 122 | Not reported | NIFC |
| Sep 11, 2026 01:00 | 456 | Not reported | NIFC |
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Sep 10, 2026 19:00 | 122 | Not reported | NIFC |
| Sep 11, 2026 01:00 | 456 | Not reported | NIFC |
Current air quality readings are unavailable for this incident. Older readings are not shown as current conditions.
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Verify evacuation orders, closures and access with the responsible fire agency, county emergency management or sheriff. A containment percentage, feed status or AQI reading does not establish that an area is safe to enter.
NIFC fire information and official resources βIRWIN ID: {B7EDA23F-55EF-4F0C-AAA6-D5CCD81B3B0C}
Discovered: Sep 10, 2026
Cause: Human
Coordinates: 45.6584, -107.7178
Other wildfires no longer present in our filtered incident feed in MT.
The Cottonwood Creek Fire has burned 456 acres as of September 11, 2026.
Containment has not been officially reported for the Cottonwood Creek Fire.
The official cause has been listed as: Human.
The Cottonwood Creek Fire is burning in Big Horn, MT.
The Cottonwood Creek Fire is no longer in our filtered incident feed. This alone does not confirm extinguishment.
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