North Fork Lost Horse Fire
Active
Ravalli County, Montana · Discovered July 25, 2026
Source: NIFC/IRWIN (interagency) · Last upstream update 8 days ago · Perimeter mapped 8 days ago (NIFC WFIGS)
North Fork Lost Horse Fire
The North Fork Lost Horse Fire fire has burned 118 acres in Ravalli County, Montana. Crews have reached 70% containment. It has shown no measurable growth in the last 24 hours. Air quality near the fire is good (AQI 0). 3 personnel are assigned to the incident.
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Incident timeline
Generated automatically from official feeds the moment they change: size, containment, evacuation zones, aircraft, and incident team updates.
Firefighting aircraft on scene (N101HX)
47 hours ago · September 24, 2026New perimeter mapped at 118 acres (national perimeter feed)
36 days ago · August 20, 2026Containment rose to 70%
39 days ago · August 17, 2026Containment rose to 60%
44 days ago · August 13, 2026Containment rose to 50%
45 days ago · August 11, 2026Fire first reported in official feeds at 118 acres
46 days ago · August 11, 2026Official update: MTBRF North Fork Fire
62 days ago · July 26, 2026
Raw growth & containment readings
| Recorded | Size | Contained |
|---|---|---|
| 8/17/2026, 10:37:40 PM | 118 acres | 70% |
| 8/13/2026, 12:02:03 AM | 118 acres | 60% |
| 8/11/2026, 11:05:40 PM | 118 acres | 50% |
| 8/11/2026, 2:04:22 PM | 118 acres | 30% |
Recorded by Fire Nearby each time upstream data changes.
About this data
Fire Nearby aggregates official incident data and shows exactly when each value was last updated. For evacuation decisions, always follow instructions from local emergency officials and check county emergency management channels.