Wildfire in Flattop Mountains, Colorado

Wildfire November 1, 2025 – November 30, 2025 · Flattop Mountains, Colorado

What the National Weather Service wrote

The Derby Fire started in mid August due to a lightning strike 13.5 miles north of Dotsero, Colorado. The fire grew to 5,453 acres spreading across Eagle and Garfield counties. While major suppression efforts ended in October and significant fire activity ceased, the remaining 5 percent was in an inaccessible area with pockets of interior smoke. It was officially 100 percent contained by mid December. The estimated cost was $23,860,000.

The wider storm

The Derby Fire started in mid August due to a lightning strike 13.5 miles north of Dotsero, Colorado. The fire grew to 5,453 acres spreading across Eagle and Garfield counties.

Source: NOAA Storm Events Database, event 1298398. Narratives are written by the National Weather Service forecast office that issued the report.

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