Feed checks and source-record updates do not necessarily mean fire conditions changed. Figures below reflect the last recorded incident report.
Automated summary generated: Oct 22, 2026 20:25 UTC. It may lag behind the report and is not an official alert.
The PK wildfire was discovered on 2026-10-09 near Sheridan, Wyoming, and has grown to 1,645 acres. By 2026-10-10 it had expanded rapidly to 1,200 acres and then to 1,645 acres by the evening of that day. Containment efforts began to show progress on 2026-10-10 with 80% containment and 15 personnel on the scene, and containment increased to 85% by 2026-10-11 with 8 personnel. The fire behavior shifted from moderate to minimal, and containment has risen to 90% by 2026-10-17 with 6 personnel still assigned. Estimated costs remain at $300,000 throughout the timeline.
Official source description: 10 Miles W from Sheridan, WY
Minimal
Good air quality at the reporting station. AQI does not assess fire danger, road access or evacuation status.
Reporting area: Sheridan. Source: AirNow.gov (EPA).
Observed: 2026-10-22 20:00:00 UTC Β· Site: Sheridan PD.
Any automated community or travel summary below may be outdated. It is not a live evacuation or road-closure notice.
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: {3B760049-485A-461D-9F06-D464880D477D}
Discovered: Oct 9, 2026
Cause: Undetermined
Est. Cost to Date: $300,000
Coordinates: 44.7516, -107.2199
Other wildfires no longer present in our filtered incident feed in WY.
The PK Fire has burned 1,645 acres as of October 17, 2026.
As of the latest update, the PK Fire is 90% contained.
The official cause has been listed as: Undetermined.
The PK Fire is burning in Sheridan, WY.
The PK Fire currently meets our U.S. incident tracking criteria. This does not confirm current fire behavior.
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