Derby Fire
The Derby Fire was reported on August 17, 2025 in Eagle County, Colorado and burned 5,453 acres. It was declared out on December 5, 2025. The cause is listed as natural.
- Size
- 5,453 acres
- Contained
- 100%
- Discovered
- August 17, 2025
- Personnel
- 8
Map
Perimeter mapped January 20, 2026 at 9:25 AM MST, 5,452 acres (mixed methods). Point of origin 39.849, -107.091.
The incident
- Size
- 5,453 acres
- Containment
- 100%
- Discovered
- August 17, 2025 at 10:39 AM MDT
- Contained
- December 5, 2025 at 2:50 PM MST
- Controlled
- December 5, 2025 at 2:57 PM MST
- Declared out
- December 5, 2025 at 3:00 PM MST
- Cause
- Natural
- Location
- 13 Miles N from Dotsero, CO
- County
- Eagle County
- State
- Colorado
- Nearest city reported
- Dotsero, CO
- Protecting agency
- USFS
- Jurisdiction
- USFS
- Land ownership at origin
- USFS
- Personnel assigned
- 8
- Incident management
- Type 5 IC, Type 5 Incident
- Primary fuel
- Short Grass (1 foot)
- Estimated cost to date
- $23,870,000
- Incident type
- Wildfire
- Unique fire identifier
- 2025-COWRF-250367
- IRWIN identifier
- 8C6286CC-8A82-4ABE-A1E8-5C9F08980141
Growth
Mapped area at the last perimeter of each day, from August 19, 2025 (34 acres) to January 20, 2026 (5,452 acres). The largest one-day growth was 1,680 acres, mapped August 20, 2025.
| Day | Acres | Change |
|---|---|---|
| August 19, 2025 | 34 | |
| August 20, 2025 | 1,714 | +1,680 |
| August 21, 2025 | 2,625 | +911 |
| August 22, 2025 | 4,112 | +1,487 |
| August 24, 2025 | 5,346 | +1,234 |
| August 26, 2025 | 5,346 | 0 |
| August 27, 2025 | 5,723 | +377 |
| August 28, 2025 | 5,736 | +13 |
| August 29, 2025 | 5,738 | +2 |
| August 30, 2025 | 5,749 | +11 |
| August 31, 2025 | 5,475 | -274 |
| September 1, 2025 | 5,475 | 0 |
| September 3, 2025 | 5,447 | -28 |
| September 4, 2025 | 5,453 | +6 |
| September 5, 2025 | 5,453 | 0 |
| September 7, 2025 | 5,452 | -1 |
| January 20, 2026 | 5,452 | 0 |
Weather in the area
This fire is no longer listed as current. The forecast for Dotsero, CO covers the area today.
Nearby
- Dotsero, CO14 miles south of the fire’s origin
- Gypsum, CO16 miles southeast of the fire’s origin
- Eagle, CO19 miles southeast of the fire’s origin
- Glenwood Springs, CO24 miles southwest of the fire’s origin
- Edwards, CO30 miles southeast of the fire’s origin
- New Castle, CO30 miles southwest of the fire’s origin
Colorado 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 June 11, 2026 at 10:20 AM MDT. Identifier 2025-COWRF-250367.