"The Wildhorse fire’s explosive growth—over 107,000 acres in just 7 days—required a large deployment of personnel and significant financial resources, highlighting the rapid escalation potential of natural fires in the region."
The Wildhorse wildfire, located 10 miles north of Kimama in Lincoln County, Idaho, was discovered on August 24, 2026, and is a natural fire under BLM jurisdiction. The fire expanded rapidly, growing from 60 acres on August 25 to 107,562 acres by August 31, with containment progressing from 0% to 100% over that period. Fire behavior shifted from active flanking to extreme running with short‑range spotting, then to minimal running as containment improved. Personnel peaked at 143 on August 28, and estimated costs rose from $100,000 to $2,500,000 as the fire grew and resources were deployed.
Official source description: 10 Miles N from Kimama, ID
Minimal; Running; Short-range Spotting
Good air quality. Outdoor activity is generally safe near this incident.
Nearest reporting station: Craters of the Moon National Monument. Source: AirNow.gov (EPA).
The fire is now fully contained and behavior is minimal; standard wildfire safety precautions still apply, but no evacuation or immediate action is required.
IRWIN ID: {177292F2-A73E-4563-AD12-4CFA3968683F}
Discovered: Aug 24, 2026
Cause: Natural
Managing Agency: BLM
Est. Cost to Date: $2,600,000
Coordinates: 43.0013, -113.8847
Other wildfires that have recently been contained or dropped from official tracking in ID.
The Wildhorse Fire has burned 107,563 acres as of September 1, 2026.
Yes, the Wildhorse Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Wildhorse Fire is burning in Lincoln, ID.
No, the Wildhorse Fire is no longer listed as active by NIFC.
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