Idaho · Active · 3,856 acres
Grotto Fire, Idaho
3,856
Acres reported
50%
Contained
0
Acres since yesterday
Last updated · refreshed every 15 minutes from the NIFC WFIGS feed · awareness only — follow local authorities
Update ·
As of Oct 4, 2026, 09:00 UTC, the Grotto Fire is listed as active at 3,856 acres, 50% contained, in Idaho County, Idaho.
No change in reported size or containment since Oct 3, 2026, 09:00 UTC.
The most recent mapped perimeter (Sep 3, 2026, 17:24 UTC) covers 3,856 acres; the mapped perimeter has been updated 4 times since the fire began.
No satellite heat detections matched to this incident in the last 24 hours (last one Sep 2, 2026, 10:06 UTC).
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Grotto 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
- 3,856 acres
- Containment
- 50%
- Status
- Active
- Discovered
- Jul 29, 2026
- Location
- Idaho County, Idaho
- Origin point
- 46.2559, -115.0937
- Perimeter mapped
- Sep 3, 2026 (31 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).
- Hamilton, MT
- Kamiah, ID
- Stevensville, MT
- Grangeville, ID
- Orofino, ID
Other fires nearby
- Three Links Fire
- Cascade Fire
- Wolf Creek Fire
- Split Fire
- Little Weitas Fire
- Moose Mountain Fire
- North Trapper Fire
Grotto 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 Jul 30, 2026, 00:15 UTC).
| Day (UTC) | Reported size | Change | Contained |
|---|---|---|---|
| Oct 4, 2026 | 3,856 acres | 0 | 50% |
| Oct 3, 2026 | 3,856 acres | 0 | 50% |
| Oct 2, 2026 | 3,856 acres | 0 | 50% |
| Oct 1, 2026 | 3,856 acres | 0 | 50% |
| Sep 30, 2026 | 3,856 acres | 0 | 50% |
| Sep 29, 2026 | 3,856 acres | 0 | 50% |
| Sep 28, 2026 | 3,856 acres | 0 | 50% |
| Sep 27, 2026 | 3,856 acres | 0 | 50% |
| Sep 26, 2026 | 3,856 acres | 0 | 50% |
| Sep 25, 2026 | 3,856 acres | 0 | 50% |
| Sep 24, 2026 | 3,856 acres | 0 | 50% |
| Sep 23, 2026 | 3,856 acres | 0 | 50% |
| Sep 22, 2026 | 3,856 acres | 0 | 50% |
| Sep 21, 2026 | 3,856 acres | 0 | 20% |
| Sep 20, 2026 | 3,856 acres | 0 | 20% |
| Sep 19, 2026 | 3,856 acres | 0 | 20% |
| Sep 18, 2026 | 3,856 acres | 0 | 20% |
| Sep 17, 2026 | 3,856 acres | 0 | 20% |
| Sep 16, 2026 | 3,856 acres | 0 | 20% |
| Sep 15, 2026 | 3,856 acres | 0 | 20% |
| Sep 14, 2026 | 3,856 acres | 0 | 0% |
| Sep 13, 2026 | 3,856 acres | 0 | 0% |
| Sep 12, 2026 | 3,856 acres | 0 | 0% |
| Sep 11, 2026 | 3,856 acres | 0 | 0% |
| Sep 10, 2026 | 3,856 acres | 0 | 0% |
| Sep 9, 2026 | 3,856 acres | +7 | 0% |
| Sep 7, 2026 | 3,849 acres | 0 | 0% |
| Sep 6, 2026 | 3,849 acres | 0 | 0% |
| Sep 5, 2026 | 3,849 acres | 0 | 0% |
| Sep 4, 2026 | 3,849 acres | 0 | 0% |
| Sep 3, 2026 | 3,849 acres | +2,944 | 0% |
| Aug 25, 2026 | 905 acres | 0 | 0% |
| Aug 24, 2026 | 905 acres | 0 | 0% |
| Aug 23, 2026 | 905 acres | 0 | 0% |
| Aug 22, 2026 | 905 acres | −95 | 0% |
| Aug 21, 2026 | 1,000 acres | 0 | 0% |
| Aug 20, 2026 | 1,000 acres | +100 | 0% |
| Aug 19, 2026 | 900 acres | 0 | 0% |
| Aug 18, 2026 | 900 acres | 0 | 0% |
| Aug 17, 2026 | 900 acres | 0 | 0% |
| Aug 16, 2026 | 900 acres | 0 | — |
| Aug 15, 2026 | 900 acres | 0 | — |
| Aug 14, 2026 | 900 acres | 0 | — |
| Aug 13, 2026 | 900 acres | +457 | — |
| Aug 12, 2026 | 443 acres | 0 | — |
| Aug 11, 2026 | 443 acres | 0 | — |
| Aug 10, 2026 | 443 acres | +423 | — |
| Aug 9, 2026 | 20 acres | 0 | — |
| Aug 8, 2026 | 20 acres | 0 | — |
| Aug 7, 2026 | 20 acres | 0 | — |
| Aug 6, 2026 | 20 acres | +20 | — |
| Aug 3, 2026 | 0.3 acres | 0 | — |
| Aug 2, 2026 | 0.3 acres | 0 | — |
| Aug 1, 2026 | 0.3 acres | 0 | — |
| Jul 31, 2026 | 0.3 acres | 0 | — |
| Jul 30, 2026 | 0.3 acres | — | — |
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Grotto Fire questions, answered from the data
How big is the Grotto Fire?
As of Oct 4, 2026, 09:00 UTC, the Grotto Fire is reported at 3,856 acres. No change in reported size or containment since Oct 3, 2026, 09:00 UTC.
Is the Grotto Fire contained?
Not fully. It was 50% contained as of Oct 4, 2026, 09:00 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 Grotto Fire?
The reported point of origin is at 46.2559, -115.0937 in Idaho County, Idaho. Nearest towns: Hamilton (45 mi E), Kamiah (45 mi W), Stevensville (51 mi E). The map on this page shows the most recent mapped perimeter.
Is the Grotto Fire still burning?
The federal feed still lists it as active as of Oct 4, 2026, 09:00 UTC; no satellite heat detections were matched to it in the last 24 hours.
What is the timeline of the Grotto Fire?
The Grotto Fire was first listed in the federal feed Jul 30, 2026, 00:15 UTC (reported discovery date Jul 29, 2026). As of Oct 4, 2026, 09:00 UTC it is still listed at 3,856 acres, 50% contained. The timeline table on this page shows the size and containment reported each UTC day across 56 days of archive.
Where do I find evacuation orders for the Grotto Fire?
From the county sheriff and local emergency management, not from this site. Check the official Idaho sources on our Idaho 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 Oct 4, 2026, 09:00 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 →