Feed checks and source-record updates do not necessarily mean fire conditions changed. Figures below reflect the last recorded incident report.
The last recorded incident change is more than 14 days old or undated. Historical fire behavior and summaries below are not confirmation of current conditions.
Automated summary generated: Oct 23, 2026 14:25 UTC. It may lag behind the report and is not an official alert.
The Ant Park wildfire, located 15 miles northeast of White Sulphur Springs in Meagher County, Montana, was discovered on July 31, 2026 and is caused by natural factors. The U.S. Forest Service is the jurisdictional agency. The fire grew from 386 acres on August 6 to 400 acres by August 7, remaining at that size thereafter. Containment increased from 27% on August 6 to 88% by August 17, and reached 100% on August 26, with minimal, smoldering behavior reported in the final updates. Personnel peaked at 229 on August 8 and declined to 4 by the time the fire was fully contained. Estimated costs rose from $2,800,000 on August 7 to $6,364,075.71 by August 25.
Official source description: 15 Miles NE from White Sulphur Springs, MT
Minimal; Smoldering; Creeping
Historical observations from incident reports, not a live forecast. Acreage and containment can decrease when agencies correct their estimates.
19
386 acres
400 acres
Latest available source report: Aug 26, 2026 20:40 UTC. This is the report date, not confirmation of current fire conditions.
Reported acreage increased by 14 acres between the first and last available acreage measurements. Recorded containment rose by 73.0 percentage points, from 27.0% (Aug 6, 2026) to 100.0% (Aug 26, 2026), using the first and last reports with a known containment value.
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Aug 6, 2026 20:32 | 386 | 27.0% | NIFC |
| Aug 7, 2026 07:13 | 400 | 27.0% | NIFC |
| Aug 12, 2026 00:20 | 400 | 40.0% | NIFC |
| Aug 13, 2026 00:00 | 400 | 53.0% | NIFC |
| Aug 13, 2026 23:40 | 400 | 64.0% | NIFC |
| Aug 15, 2026 00:00 | 400 | 74.0% | NIFC |
| Aug 15, 2026 23:00 | 400 | 85.0% | NIFC |
| Aug 17, 2026 16:40 | 400 | 88.0% | NIFC |
| Aug 23, 2026 22:40 | 400 | 95.0% | NIFC |
| Aug 26, 2026 20:40 | 400 | 100.0% | NIFC |
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Aug 6, 2026 20:32 | 386 | 27.0% | NIFC |
| Aug 7, 2026 07:13 | 400 | 27.0% | NIFC |
| Aug 8, 2026 00:00 | 400 | 27.0% | NIFC |
| Aug 9, 2026 01:00 | 400 | 27.0% | NIFC |
| Aug 9, 2026 23:40 | 400 | 27.0% | NIFC |
| Aug 11, 2026 00:00 | 400 | 27.0% | NIFC |
| Aug 12, 2026 00:20 | 400 | 40.0% | NIFC |
| Aug 13, 2026 00:00 | 400 | 53.0% | NIFC |
| Aug 13, 2026 23:40 | 400 | 64.0% | NIFC |
| Aug 15, 2026 00:00 | 400 | 74.0% | NIFC |
| Aug 15, 2026 23:00 | 400 | 85.0% | NIFC |
| Aug 17, 2026 16:40 | 400 | 88.0% | NIFC |
| Aug 18, 2026 21:20 | 400 | 88.0% | NIFC |
| Aug 21, 2026 21:00 | 400 | 88.0% | NIFC |
| Aug 23, 2026 00:40 | 400 | 88.0% | NIFC |
| Aug 23, 2026 22:40 | 400 | 95.0% | NIFC |
| Aug 24, 2026 20:40 | 400 | 95.0% | NIFC |
| Aug 25, 2026 21:20 | 400 | 95.0% | NIFC |
| Aug 26, 2026 20:40 | 400 | 100.0% | NIFC |
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Verify evacuation orders, closures and access with the responsible fire agency, county emergency management or sheriff. A containment percentage, feed status or AQI reading does not establish that an area is safe to enter.
NIFC fire information and official resources βIRWIN ID: {0910A9E1-186B-4DA3-8ECB-75028DCC057F}
Discovered: Jul 31, 2026
Cause: Natural
Managing Agency: USFS
Est. Cost to Date: $6,364,076
Coordinates: 46.7365, -110.6397
Other wildfires no longer present in our filtered incident feed in MT.
The Ant Park Fire has burned 400 acres as of August 26, 2026.
Yes, the Ant Park Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Ant Park Fire is burning in Meagher, MT.
The Ant Park Fire is no longer in our filtered incident feed. This alone does not confirm extinguishment.
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