Post Fire

Las Animas County, Colorado · Wildfire

Active Official numbers updated Sep 10, 2026 (6 days ago)

First reported about 5 weeks ago

Metric	Last report	Now	Change
Size	4,343 acres Sep 3, 11:00 AM	4,335 acres Sep 16, 4:00 AM −8 acres was 4,343 acres · Sep 3, 11:00 AM	−8 acres in 13 days
Containment	80% Aug 20, 4:01 PM	90% Sep 16, 4:00 AM +10 percent was 80% · Aug 20, 4:01 PM	+10 percent in 27 days
Crew size	23 Aug 21, 4:01 PM	1 Sep 16, 4:00 AM −22 was 23 · Aug 21, 4:01 PM	−22 in 26 days
Money spent	$1.3M Aug 21, 4:01 PM	$1.3M Sep 16, 4:00 AM +$8,000 was $1.3M · Aug 21, 4:01 PM	+$8,000 in 26 days

Post Fire summary

The Post Fire is a wildfire near Las Animas County, Colorado. It has burned about 4,335 acres (about 3,000 football fields). Crews have boxed in 90% of its edge; the other 10% isn't contained yet. It was first reported about 5 weeks ago. About 1 people are on it, run by a Type 4 IC. We're also tracking 4 other active fires within about 75 miles.

Size: 4,335 acres
Containment: 90%
Discovered: August 12, 2026 (first reported about 5 weeks ago)
Cause: Not reported

The size and containment above are current as of Wednesday, September 16th at 4:00 a.m. CDT.

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Weather & fire-spread conditions

No Red Flag Warning. The National Weather Service hasn't flagged this area for dangerous fire-spread conditions right now.

Hot, dry, and windy weather can help a fire grow; cool, calm, or wet weather helps crews. The tags below rate each day for fire spread — green is calm, red can push a fire.

A general fire-weather guide (wind matters most, then how dry it is, then heat), not a prediction of what this fire will do.

Overnight

53°F · Chance Showers And Thunderstorms

Wind 15 to 20 mph SSW · 32% chance of rain

Wind: Windy Heat: Cool Some rain

Wednesday

64°F · Slight Chance Rain Showers then Chance Showers And Thunderstorms

Wind 15 to 20 mph SSW · 56% chance of rain

Wind: Windy Heat: Cool Rain likely

Wednesday Night

54°F · Showers And Thunderstorms Likely

Wind 15 to 25 mph SSW · 57% chance of rain

Wind: Windy Heat: Cool Rain likely

Thursday

63°F · Slight Chance Rain Showers then Chance Showers And Thunderstorms

Wind 25 mph SSW · 33% chance of rain

Wind: Windy Heat: Cool Some rain

Thursday Night

55°F · Slight Chance Showers And Thunderstorms then Mostly Cloudy

Wind 25 to 30 mph SSW · 12% chance of rain

Wind: High wind Heat: Cool Dry

Forecast from the National Weather Service (weather.gov), pulled Wednesday, September 16th at 4:01 a.m. CDT.

Could this fire move fast?

Weather isn't the only thing that changes how a fire moves. The ground matters too: how steep it is, and what's growing on it. These four numbers are for the exact spot where this fire started, not the whole fire. A big fire crosses a lot of different ground.

31° slope

Fire usually moves faster uphill than downhill. Heat and flame lean uphill, drying out the ground above the fire before it gets there.

Fallen leaves and needles (TL5)

A heavy layer of pine needles with some light slash or dead wood. Fire moves slow, with short flames.

25% tree canopy cover

The more tree cover above a fire, the easier it is for the fire to climb from the ground into the treetops. That's called a crown fire. Crown fires move faster, throw embers farther ahead of the fire, and are harder for crews to stop head-on.

8,233 ft elevation

Elevation by itself doesn't make a fire more or less dangerous. But it shapes the other three numbers here: what grows there, how dry things get, and what the weather does.

Elevation and slope from the USGS 3D Elevation Program; fuel type and canopy cover from LANDFIRE (USGS and U.S. Forest Service), pulled Thursday, September 10th at 3:50 p.m. CDT.

Who's on it

About 1 people are assigned to this fire, run by a Type 4 IC. The government rates it a Type 5 Incident. About $1 million has been spent on it so far.

The official feed reports the total headcount, not a breakdown by crew type.