"The fire’s rapid growth from 500 to 506 acres in the first hour and subsequent containment within the same day demonstrate effective firefighting response. The incident involved 23 personnel and incurred an estimated cost of $25,000, highlighting the resources required for even relatively small fires."
The Little Mountain wildfire, located in Box Elder County, Utah, was first discovered on August 20, 2026, and is still active. The fire began as a human‑caused incident and was reported by NIFC. Initial reports on August 21 indicated a 500‑acre blaze that grew to 506 acres by 01:00 UT. By 01:40 UT the fire was 45% contained, with 23 personnel on the scene and described as active and wind‑driven. Later that day the fire shrank to 403 acres and was fully contained at 100% with the same 23 personnel, maintaining minimal wind‑driven activity. As of September 11, the fire remains fully contained at 100% with 400.2 acres reported, still under minimal wind‑driven behavior.
Official source description: 7 Miles S from Tremonton, UT
Minimal; Wind Driven Runs
Current air quality readings are unavailable for this incident. Older readings are not shown as current conditions.
Check current air quality on AirNow.gov →The fire is currently fully contained with minimal wind‑driven activity. General wildfire safety guidance applies, but no immediate evacuation or shelter‑in‑place orders are necessary.
IRWIN ID: {332F7449-E7F5-4DEB-AE37-79E2D54DE961}
Discovered: Aug 20, 2026
Cause: Human
Est. Cost to Date: $25,000
Coordinates: 41.607, -112.2143
Other wildfires no longer present in our filtered incident feed in UT.
The Little Mountain Fire has burned 400 acres as of September 11, 2026.
Yes, the Little Mountain Fire is fully contained (100%).
The official cause has been listed as: Human.
The Little Mountain Fire is burning in Box Elder, UT.
The Little Mountain Fire is no longer in our filtered incident feed. This alone does not confirm extinguishment.
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