"The Big Rock wildfire is notable due to its containment trajectory, with a rapid increase in containment percentage from 22% to 100% within a week, indicating effective firefighting efforts."
The Big Rock wildfire is located in Jefferson County, Idaho, approximately 20 miles east of Idaho Falls. The fire has been burning since July 31, 2026, and is caused by natural factors. The fire has been contained at 100% as of August 13, 2026, with a total of 2,142 acres burned. The fire behavior has been minimal, creeping, and smoldering throughout the incident. The fire was initially reported on August 6, 2026, with 2,149 acres and 22% containment, but has since been contained with a significant reduction in personnel and estimated cost.
Official source description: 20 Miles E from Idaho Falls, ID
Minimal; Creeping; Smoldering
Given the current minimal fire behavior and 100% containment, general wildfire safety guidance applies. However, it is essential to remain vigilant and follow local authorities' instructions, as conditions can change rapidly.
IRWIN ID: {0BB99778-8D64-476C-BA6A-BC8006391084}
Discovered: Jul 31, 2026
Cause: Natural
Managing Agency: BLM
Est. Cost to Date: $3,530,000
Coordinates: 43.6381, -111.6643
Other wildfires that have recently been contained or dropped from official tracking in ID.
The Big Rock Fire has burned 2,142 acres as of August 13, 2026.
Yes, the Big Rock Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Big Rock Fire is burning in Jefferson, ID.
No, the Big Rock Fire is no longer listed as active by NIFC.
Real-time map, acreage, and containment for every major U.S. wildfire, updated from official NIFC data.
View Live Map →