2026 Custer County, Montana Wildfires
Newest wildfires in Custer County
Largest wildfires in Custer County this season
All 2026 Custer County Fires · 11 fires
A fire is listed here when it is located in Custer County. Each complex is counted once, through its parent: the parent carries the complex's acres, and its member fires are listed beneath it without being counted again. A fire that crossed a county line is listed with the acres that burned in Custer County, not its whole reported size. A fire located elsewhere that burned into Custer County is listed too, at its Custer County acres, and is not added to the Custer County fire counts. County lines come from a different boundary dataset than state lines, so Custer County's acres are counted along county lines and can differ a little at the edges from the figures on the state page.
| Fire | Start date | Containment | Status | Acres | Center | Ignition point |
|---|---|---|---|---|---|---|
| Baldy Peak Fire | Jul 27, 2026 | — | Inactive | 87 | 46.4299, -105.3961 | 46.4275, -105.3920 |
| Reservoir Fire | Jul 27, 2026 | — | Inactive | 73 | 46.4254, -105.3771 | 46.4240, -105.3800 |
| Sunday Creek-Custer Fire | Jul 11, 2026 | — | Inactive | 39 | 46.5110, -105.8510 | 46.4989, -105.8536 |
| Wilson Creek -Custer Fire | Jul 4, 2026 | — | Inactive | 3 | 46.3076, -104.9592 | 46.5128, -105.5997 |
| Bear Jaw Fire | Aug 18, 2026 | — | Inactive | 2 | 46.0604, -105.1720 | 45.9113, -105.2823 |
| Williams -Custer Fire | Jul 28, 2026 | — | Inactive | 2 | 46.6558, -105.4943 | 46.6529, -105.5000 |
| Cedar Canyon -Custer Fire | Jul 27, 2026 | — | Inactive | 2 | 46.4270, -105.4420 | 46.4270, -105.4417 |
| Log Creek Fire | Aug 18, 2026 | — | Inactive | 1 | 46.3215, -105.7551 | 46.3070, -105.7139 |
| Pine Hills Fire | May 14, 2026 | — | Inactive | 1 | 46.4106, -105.6648 | 46.4105, -105.6656 |
| North Fork Smith Fire | Jul 27, 2026 | — | Inactive | 0 | 46.4254, -105.3846 | 46.4254, -105.3847 |
| Fort Keogh Fire | Jul 23, 2026 | — | Inactive | 0 | 46.3839, -105.8869 | 46.3902, -105.8805 |
| Also burned into Custer County | ||||||
| Rattlesnake Complex from Prairie County | Sep 4, 2026 | 100% | Inactive | 9,300 of 15,611 | 46.5860, -104.9280 | — |
| Totals | 2026 Season Fires 11 | Active Fires 0 | Acres Burning 0 | 2026 Season Acres 9,510 | ||
Land cover · Custer County 2026
Burned acres in Custer County for the 2026 season, split by the kind of land that burned. Each figure counts the LANDFIRE 30 m cells inside a fire's latest mapped perimeter. The Fires tab carries the reported season acreage.
Forest ownership · Custer County 2026
Burned forest acres in Custer County for the 2026 season, split by who owns the land. Owners are mapped for forestland, so every figure here counts burned cells whose LANDFIRE lifeform is Tree. The Fires tab carries the season acreage this site reports.
Burn severity · Custer County 2026
Burned acres in Custer County for the 2026 season, split by how severely each cell of ground burned. Each figure counts the 30 m cells inside a fire's latest mapped perimeter, measured from satellite imagery. The Fires tab carries the reported season acreage.
Severity comes from the differenced normalized burn ratio (dNBR), the same index the federal burn severity programs publish, classified with the standard thresholds.
This is an initial assessment. Trees keep dying for months after a burn, so severity in forest reads conservative until the official assessments arrive after the season.