Colorado · Active · 4,343 acres
Post Fire, Colorado
4,343
Acres reported
65%
Contained
+9
Acres since yesterday
Last updated · refreshed every 15 minutes from the NIFC WFIGS feed · awareness only — follow local authorities
Update ·
As of Aug 18, 2026, 09:15 UTC, the Post Fire is listed as active at 4,343 acres, 65% contained, in Las Animas County, Colorado.
Since Aug 17, 2026, 09:00 UTC: +9 acres.
The most recent mapped perimeter (Aug 14, 2026, 17:02 UTC) covers 4,343 acres; the mapped perimeter has been updated 3 times since the fire began.
No satellite heat detections matched to this incident in the last 24 hours (last one Aug 14, 2026, 09:05 UTC).
Post Fire map
The most recent mapped perimeter (solid) and the previous day's perimeter (dashed), with the reported point of origin.
Latest perimeter Previous perimeter · Perimeters come from the WFIGS interagency perimeter service and are usually mapped once a day; the mapped area can differ from the reported acreage.
Key facts
- Size
- 4,343 acres
- Containment
- 65%
- Status
- Active
- Discovered
- Aug 12, 2026
- Location
- Las Animas County, Colorado
- Origin point
- 37.0820, -104.4214
- Perimeter mapped
- Aug 14, 2026 (4 days ago)
- Satellite heat, 24 h
- none matched
Nearest towns
Distances are from the reported point of origin, not from the fire’s edge (see the perimeter map for the current extent).
- Trinidad, CO
- Raton, NM
- Walsenburg, CO
Other fires nearby
- Buhr Fire
- Gonzales Fire
Post Fire daily history
The largest size and containment reported each UTC day, from our 15-minute archive of the federal feed (first seen Aug 12, 2026, 01:15 UTC).
| Day (UTC) | Reported size | Change | Contained |
|---|---|---|---|
| Aug 18, 2026 | 4,343 acres | 0 | 65% |
| Aug 17, 2026 | 4,343 acres | +9 | 65% |
| Aug 16, 2026 | 4,334 acres | 0 | — |
| Aug 15, 2026 | 4,334 acres | 0 | — |
| Aug 14, 2026 | 4,334 acres | +129 | — |
| Aug 13, 2026 | 4,205 acres | +1,778 | — |
| Aug 12, 2026 | 2,427 acres | — | — |
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Post Fire questions, answered from the data
How big is the Post Fire?
As of Aug 18, 2026, 09:15 UTC, the Post Fire is reported at 4,343 acres. Since Aug 17, 2026, 09:00 UTC: +9 acres.
Is the Post Fire contained?
Not fully. It was 65% contained as of Aug 18, 2026, 09:15 UTC. Containment is the share of the fire's edge that has a control line; it is reported by the incident team and can lag the ground situation.
Where is the Post Fire?
The reported point of origin is at 37.0820, -104.4214 in Las Animas County, Colorado. Nearest towns: Trinidad (7.4 mi NW), Raton (12 mi S), Walsenburg (42 mi NW). The map on this page shows the most recent mapped perimeter.
Is the Post Fire still burning?
The federal feed still lists it as active as of Aug 18, 2026, 09:15 UTC; no satellite heat detections were matched to it in the last 24 hours.
Where do I find evacuation orders for the Post Fire?
From the county sheriff and local emergency management, not from this site. Check the official Colorado sources on our Colorado page and your county’s alert system. FireRiskHere is for awareness only.
How current is this page?
The numbers come from the National Interagency Fire Center's WFIGS incident feed and the WFIGS perimeter service, refreshed every 15 minutes, plus NASA FIRMS satellite detections hourly. This page was last updated Aug 18, 2026, 09:15 UTC. Acreage and containment are what the incident team reports and can lag by hours.
About this page
This page is generated automatically for every wildfire whose reported size reaches 1,000 acres, from FireRiskHere’s archive of the National Interagency Fire Center’s WFIGS incident feed (captured every 15 minutes), the WFIGS interagency perimeter service, and NASA FIRMS satellite detections. It stays online after the fire is contained as a record of the incident. Nothing here is an official notice — for evacuation orders and road closures follow your county sheriff and local emergency management. How the site works →