Knowles Fire
The Knowles Fire was reported on August 17, 2025 in Sanders County, Montana and burned 3,816 acres. It was declared out on December 11, 2025. The cause is listed as human.
- Size
- 3,816 acres
- Contained
- 100%
- Discovered
- August 17, 2025
- Personnel
- 42
Map
Perimeter mapped December 23, 2025 at 9:04 AM MST, 3,816 acres (mixed methods). Point of origin 47.347, -114.713.
The incident
- Size
- 3,816 acres
- Containment
- 100%
- Discovered
- August 17, 2025 at 3:01 PM MDT
- Contained
- September 6, 2025 at 7:00 PM MDT
- Controlled
- December 11, 2025 at 8:00 AM MST
- Declared out
- December 11, 2025 at 9:00 AM MST
- Cause
- Human
- Location
- 11 Miles E from Plains, MT
- County
- Sanders County
- State
- Montana
- Nearest city reported
- Plains
- Protecting agency
- DNRC
- Land ownership at origin
- State
- Personnel assigned
- 42
- Incident management
- Type 4 IC, Type 3 Incident
- Primary fuel
- Timber (Litter and Understory)
- Estimated cost to date
- $6,500,000
- Incident type
- Wildfire
- Unique fire identifier
- 2025-MTNWS-250543
- IRWIN identifier
- 42CC0318-C208-412F-A5A5-BD1054AFD86F
Growth
Mapped area at the last perimeter of each day, from August 18, 2025 (280 acres) to December 23, 2025 (3,816 acres). The largest one-day growth was 1,263 acres, mapped August 23, 2025.
| Day | Acres | Change |
|---|---|---|
| August 18, 2025 | 280 | |
| August 19, 2025 | 745 | +465 |
| August 20, 2025 | 1,812 | +1,067 |
| August 21, 2025 | 1,948 | +136 |
| August 22, 2025 | 2,304 | +356 |
| August 23, 2025 | 3,567 | +1,263 |
| August 24, 2025 | 3,595 | +28 |
| August 25, 2025 | 3,638 | +43 |
| August 26, 2025 | 3,790 | +152 |
| August 27, 2025 | 3,790 | 0 |
| September 1, 2025 | 3,822 | +32 |
| December 23, 2025 | 3,816 | -6 |
Weather in the area
This fire is no longer listed as current. The forecast for Plains, MT covers the area today.
Nearby
- Plains, MT11 miles northwest of the fire’s origin
- Ronan, MT31 miles northeast of the fire’s origin
- Frenchtown, MT32 miles southeast of the fire’s origin
- Pablo, MT33 miles northeast of the fire’s origin
- Thompson Falls, MT34 miles northwest of the fire’s origin
- Polson, MT35 miles northeast of the fire’s origin
Montana wildfires today Wildfires of 2025 All current fires
Incident record from the National Interagency Fire Center’s Wildland Fire Interagency Geospatial Services (WFIGS), as the incident’s managers report it; last updated April 17, 2026 at 2:37 PM MDT. Identifier 2025-MTNWS-250543.