Border Fire
Active
Boundary County, Idaho · Discovered August 25, 2026
Source: NIFC/IRWIN (interagency) · Last upstream update 5 days ago
Border Fire
The Border Fire fire has burned 35 acres in Boundary County, Idaho. Crews have fully contained the fire. It has shown no measurable growth in the last 24 hours. Air quality near the fire is unhealthy for sensitive groups (AQI 138).
Border Fire size over time
12 official size readingsPeaked at 46 acres, then officials revised the mapped size to 35 acres.
Acreage as reported by the official incident feed, recorded by Fire Nearby each time it changes. Hover or tap the chart for each reading.
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Incident timeline
Generated automatically from official feeds the moment they change: size, containment, evacuation zones, aircraft, and incident team updates.
Fire reported 100% contained
5 days ago · November 5, 2026Containment rose to 100%
64 days ago · September 7, 2026Containment rose to 83%
69 days ago · September 2, 2026Containment rose to 38%
70 days ago · September 1, 2026Containment rose to 20%
71 days ago · August 31, 2026New perimeter mapped at 43 acres (national perimeter feed)
72 days ago · August 30, 2026Containment dropped to 0% (from 100%)
73 days ago · August 30, 2026Grew 34 acres in 3 days to 35 acres
74 days ago · August 28, 2026Fire first listed in official incident feeds at 2 acres
77 days ago · August 26, 2026
Raw growth & containment readings
| Recorded | Size | Contained |
|---|---|---|
| 9/7/2026, 11:10:54 PM | 35 acres | 100% |
| 9/7/2026, 10:50:54 PM | 37 acres | 100% |
| 9/7/2026, 2:35:48 AM | 37 acres | 83% |
| 9/7/2026, 2:10:48 AM | 35 acres | 83% |
| 9/2/2026, 11:23:06 PM | 37 acres | 83% |
| 9/1/2026, 11:09:34 PM | 46 acres | 38% |
| 8/31/2026, 11:57:56 PM | 46 acres | 20% |
| 8/30/2026, 12:06:36 AM | 43 acres | 0% |
| 8/28/2026, 3:14:52 PM | 35 acres | - |
| 8/27/2026, 4:53:32 PM | 7.8 acres | - |
| 8/26/2026, 10:39:11 PM | 5.5 acres | - |
| 8/26/2026, 1:21:45 AM | 1.5 acres | - |
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.