"The fire’s rapid early growth and the substantial resources committed—over 150 personnel and an estimated cost of $1.8 million—highlight its significance in the region’s wildfire season."
The COW CAMP wildfire, located 20 miles southeast of Ten Sleep in Washakie County, Wyoming, was first discovered on September 3, 2026. The fire grew rapidly from 55 acres on September 4 to a peak of 300 acres on September 5, before stabilizing at 282 acres and then shrinking to 244 acres by September 10. Containment progressed from 1% on September 5 to 43% on September 7, 76% on September 9, 95% on September 10, and finally 100% on September 20. Personnel peaked at 150 on September 7 and declined to 3 by the final report. The cause remains undetermined and the jurisdictional agency is not specified. Fire behavior ranged from extreme spotting on September 5 to minimal smoldering by September 20.
Official source description: 20 Miles SE from Ten Sleep, WY
Minimal; Smoldering; Single Tree Torching
Good air quality. Outdoor activity is generally safe near this incident.
Nearest reporting station: Johnson County. Source: AirNow.gov (EPA).
With the fire now fully contained and behavior minimal, general wildfire safety guidance applies. Stay informed of local advisories and avoid venturing into the former fire perimeter until it is officially cleared.
IRWIN ID: {9DC478E2-054F-4E69-8CE7-DB4E48730C78}
Discovered: Sep 3, 2026
Cause: Undetermined
Est. Cost to Date: $1,830,000
Coordinates: 43.8305, -107.1783
Other wildfires that have recently been contained or dropped from official tracking in WY.
The COW CAMP Fire has burned 244 acres as of September 20, 2026.
Yes, the COW CAMP Fire is fully contained (100%).
The official cause has been listed as: Undetermined.
The COW CAMP Fire is burning in Washakie, WY.
Yes, as of the latest official update, the COW CAMP Fire remains active.
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