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 15, 2026 18:25 UTC. It may lag behind the report and is not an official alert.
The Post Fire, a natural‑ignition wildfire in Las Animas County, Colorado, was first discovered on August 12, 2026, near 37.082°N, 104.421°W. By August 13 the blaze had expanded to 4,205 acres and was 25% contained, with 72 personnel on the scene. The fire grew modestly to 4,334 acres by August 14 and reached 55% containment by August 17, after which growth stalled and containment steadily increased to 100% by October 15. Throughout the timeline the fire behavior shifted from active flanking to minimal smoldering and creeping, with no reported evacuations or weather impacts. The incident cost estimate rose to $1,260,873 as resources were deployed and containment progressed.
Official source description: 7 Miles SE from Trinidad, CO
Minimal; Creeping; Smoldering; Isolated Torching
Historical observations from incident reports, not a live forecast. Acreage and containment can decrease when agencies correct their estimates.
17
1,000 acres
4,335 acres
Latest available source report: Oct 15, 2026 18:09 UTC. This is the report date, not confirmation of current fire conditions.
Reported acreage increased by 3,335 acres between the first and last available acreage measurements. Recorded containment rose by 100.0 percentage points, from 0.0% (Aug 13, 2026) to 100.0% (Oct 15, 2026), using the first and last reports with a known containment value.
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Aug 12, 2026 01:20 | 1,000 | Not reported | NIFC |
| Aug 12, 2026 16:40 | 2,427 | Not reported | NIFC |
| Aug 13, 2026 16:40 | 4,205 | 0.0% | NIFC |
| Aug 13, 2026 17:20 | 4,205 | 25.0% | NIFC |
| Aug 14, 2026 22:00 | 4,334 | 25.0% | NIFC |
| Aug 15, 2026 21:40 | 4,334 | 45.0% | NIFC |
| Aug 17, 2026 16:40 | 4,343 | 55.0% | NIFC |
| Aug 18, 2026 21:20 | 4,343 | 70.0% | NIFC |
| Aug 19, 2026 22:00 | 4,343 | 80.0% | NIFC |
| Aug 20, 2026 21:40 | 4,343 | 90.0% | NIFC |
| Oct 8, 2026 19:20 | 4,335 | 95.0% | NIFC |
| Oct 15, 2026 18:09 | 4,335 | 100.0% | NIFC |
Showing 12 representative changes from 16 distinct recorded measurements, including the first and last distinct measurements. The latest source report date is shown above, even when measurements have not changed.
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Aug 12, 2026 01:20 | 1,000 | Not reported | NIFC |
| Aug 12, 2026 16:40 | 2,427 | Not reported | NIFC |
| Aug 13, 2026 00:00 | 2,427 | 0.0% | NIFC |
| Aug 13, 2026 16:40 | 4,205 | 0.0% | NIFC |
| Aug 13, 2026 17:20 | 4,205 | 25.0% | NIFC |
| Aug 14, 2026 22:00 | 4,334 | 25.0% | NIFC |
| Aug 14, 2026 22:20 | 4,334 | 30.0% | NIFC |
| Aug 15, 2026 21:40 | 4,334 | 45.0% | NIFC |
| Aug 17, 2026 16:40 | 4,343 | 55.0% | NIFC |
| Aug 17, 2026 21:20 | 4,343 | 65.0% | NIFC |
| Aug 18, 2026 21:20 | 4,343 | 70.0% | NIFC |
| Aug 19, 2026 22:00 | 4,343 | 80.0% | NIFC |
| Aug 20, 2026 21:40 | 4,343 | 90.0% | NIFC |
| Aug 21, 2026 22:00 | 4,343 | 90.0% | NIFC |
| Sep 3, 2026 16:40 | 4,335 | 90.0% | NIFC |
| Oct 8, 2026 19:20 | 4,335 | 95.0% | NIFC |
| Oct 15, 2026 18:09 | 4,335 | 100.0% | NIFC |
Current air quality readings are unavailable for this incident. Older readings are not shown as current conditions.
Check current air quality on AirNow.gov →Any automated community or travel summary below may be outdated. It is not a live evacuation or road-closure notice.
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 →IRWIN ID: {251FD40C-6BCB-4C69-81EC-F105E1328374}
Discovered: Aug 12, 2026
Cause: Natural
Est. Cost to Date: $1,260,873
Coordinates: 37.082, -104.4214
Other wildfires no longer present in our filtered incident feed in CO.
The Post Fire has burned 4,335 acres as of October 15, 2026.
Yes, the Post Fire is fully contained (100%).
The official cause has been listed as: Natural.
The Post Fire is burning in Las Animas, CO.
The Post Fire is no longer in our filtered incident feed. This alone does not confirm extinguishment.
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