Montana · incident record
Slough Grass Fire, Montana
5,465
Acres reported
—
Contained
−1,002
Acres since yesterday
Last updated · refreshed every 15 minutes from the NIFC WFIGS feed · awareness only — follow local authorities
Update ·
As of Aug 9, 2026, 19:30 UTC, the Slough Grass Fire is no longer listed in the federal active-fire feed at 5,465 acres, in Montana.
Since Aug 8, 2026, 19:30 UTC: −1,002 acres.
The most recent mapped perimeter (Aug 7, 2026, 16:37 UTC) covers 6,400 acres.
No satellite heat detections matched to this incident in the last 24 hours (last one Aug 8, 2026, 19:00 UTC).
It was last present in the feed Aug 9, 2026, 19:30 UTC; the largest size reported was 6,467 acres. This page stays up as a record of the incident.
Slough Grass Fire map
The most recent mapped perimeter, with the reported point of origin.
Latest 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
- 5,465 acres
- Containment
- not reported
- Status
- Not in feed (last seen Aug 9, 2026)
- Discovered
- Aug 6, 2026
- Location
- Montana
- Origin point
- 45.7525, -106.8050
- Peak reported size
- 6,467 acres
- Perimeter mapped
- Aug 7, 2026 (56 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).
- Lame Deer, MT
- Colstrip, MT
- Crow Agency, MT
- Forsyth, MT
- Hardin, MT
Other fires nearby
- Muddy Cluster Fire
- County Fire
- Coal Seam Fire
- Water Tower 2 Fire
- Water Tower Fire
- Depot Fire
- Buck Ridge Fire
- East LD Fire
Slough Grass Fire timeline
Day by day: the largest size and containment reported each UTC day, from our 15-minute archive of the federal feed (first seen Aug 6, 2026, 22:45 UTC).
| Day (UTC) | Reported size | Change | Contained |
|---|---|---|---|
| Aug 9, 2026 | 5,465 acres | −1,002 | — |
| Aug 8, 2026 | 6,467 acres | 0 | — |
| Aug 7, 2026 | 6,467 acres | +6,067 | — |
| Aug 6, 2026 | 400 acres | — | — |
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Slough Grass Fire questions, answered from the data
How big is the Slough Grass Fire?
As of Aug 9, 2026, 19:30 UTC, the Slough Grass Fire is reported at 5,465 acres (peak reported size 6,467 acres). Since Aug 8, 2026, 19:30 UTC: −1,002 acres.
Is the Slough Grass Fire contained?
Containment has not been reported for the Slough Grass Fire in the federal feed as of Aug 9, 2026, 19:30 UTC.
Where is the Slough Grass Fire?
The reported point of origin is at 45.7525, -106.8050 in Montana. Nearest towns: Lame Deer (11 mi SE), Colstrip (13 mi NE), Crow Agency (33 mi W). The map on this page shows the most recent mapped perimeter.
Is the Slough Grass Fire still burning?
It is no longer in the federal active-fire feed; it was last listed Aug 9, 2026, 19:30 UTC. Fires drop out of the feed when the incident is closed or handed to local management, not necessarily when every ember is out.
What is the timeline of the Slough Grass Fire?
The Slough Grass Fire was first listed in the federal feed Aug 6, 2026, 22:45 UTC (reported discovery date Aug 6, 2026). It was last listed Aug 9, 2026, 19:30 UTC, after peaking at 6,467 acres. The timeline table on this page shows the size and containment reported each UTC day across 4 days of archive.
Where do I find evacuation orders for the Slough Grass Fire?
From the county sheriff and local emergency management, not from this site. Check the official Montana sources on our Montana 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 9, 2026, 19:30 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 →