Bison Fire
No longer in current feed
Osage County, Oklahoma · Discovered August 21, 2026
Source: NIFC/IRWIN (interagency) · Last upstream update 42 days ago
Bison Fire
The Bison Fire fire has burned 889 acres in Osage County, Oklahoma. It is no longer in the current official feed, so the figures on this page reflect the last data reported. Crews have fully contained the fire. Air quality near the fire is good (AQI 28). 4 personnel are assigned to the incident.
Bison Fire size over time
6 official size readingsGrew from 700 to 889 acres across these reports.
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
62 days ago · September 10, 2026Containment rose to 100%
70 days ago · September 1, 2026Containment rose to 85%
73 days ago · August 29, 2026Containment rose to 50%
76 days ago · August 26, 2026Containment rose to 45%
78 days ago · August 24, 2026Containment dropped to 30% (from 100%)
79 days ago · August 23, 2026Grew 189 acres in 48 hours to 889 acres
79 days ago · August 23, 2026Fire first listed in official incident feeds at 700 acres
81 days ago · August 21, 2026
Raw growth & containment readings
| Recorded | Size | Contained |
|---|---|---|
| 9/1/2026, 2:53:05 PM | 889 acres | 100% |
| 8/29/2026, 8:54:21 PM | 889 acres | 85% |
| 8/26/2026, 3:46:42 PM | 889 acres | 50% |
| 8/24/2026, 9:44:02 PM | 889 acres | 45% |
| 8/23/2026, 5:18:02 PM | 889 acres | 30% |
| 8/21/2026, 5:04:18 PM | 700 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.