Derby Fire

Derby Fire · Started Aug 19, 2025 at 10:23 PM

n/aacres

n/acontained

n/apersonnel

Under reviewcause

Aug 19, 2025 at 10:23 PMdiscovered

Approximate area based on reported fire size

About this incident

A Type 4 incident management organization has taken command of the Derby fire, with Matt Pfeifer as Incident Commander.

The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.

Protection of life and property are key objectives for managing this fire.

Updates

12 · newest first

Oct 23, 2025, 5:24 PM
Wildfire contained: Derby Fire
This wildfire is 90% contained and has not been updated in 21 days, indicating it is no longer active.
A Type 4 incident management organization has taken command of the Derby fire, with Matt Pfeifer as Incident Commander.
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Oct 22, 2025, 10:15 AM
Wildfire reactivated: Derby Fire
Updated information for this wildfire:
A Type 4 incident management organization has taken command of the Derby fire, with Matt Pfeifer as Incident Commander.
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.

Severity: critical
Oct 22, 2025, 7:15 AM
Fire resolved: Derby Fire
This fire is no longer active according to InciWeb and has been marked as resolved.
Oct 16, 2025, 1:15 AM
Fire resolved: Derby Fire
This fire has not been updated in 7 days and has been marked as resolved.
Sep 13, 2025, 10:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
A Type 3 incident management organization has taken command of the Derby fire, with Matt Pfeifer as Incident Commander.
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.

Severity: critical
Sep 6, 2025, 10:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
As of Saturday, September 6th at 6:00a.m., a Type 3 incident management organization has taken command of the Derby fire, with Patrick Kieran as Incident Commander.
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.

Severity: critical
Sep 5, 2025, 10:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
On Saturday, September 6th at 6:00a.m., Rocky Mountain Area Complex Incident Management Team Three will transfer command to a Type 3 incident management organization, with Patrick Kieran as Incident Commander.
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Rocky Mountain Area Complex Incident Management Team Three assumed command of the fire on the morning of Saturday, August 30, 2025.
Severity: critical
Sep 3, 2025, 4:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening, August 16, 2025. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Rocky Mountain Area Complex Incident Management Team Three assumed command of the fire on the morning of Saturday, August 30, 2025.
Severity: critical
Aug 30, 2025, 4:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Rocky Mountain Area Complex Incident Management Team Three assumed command of the fire on the morning of Saturday, August 30, 2025.
Severity: critical
Aug 24, 2025, 7:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Northern Rockies Complex Incident Management Team 3 assumed command of the fire on the morning of Wednesday, August 20.
Severity: critical
Aug 21, 2025, 7:15 AM
Update for wildfire: Derby Fire
Updated information for this wildfire:
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Northern Rockies Complex Incident Management Team 3 assumed command of the fire on the morning of Wednesday, August 20.
Severity: danger
Aug 20, 2025, 10:15 PM
Update for wildfire: Derby Fire
Updated information for this wildfire:
The Derby Fire was ignited by lightning on an extremely steep cliff face in a remote area near the Flat Tops Wilderness on Saturday evening. Initial attack efforts by smokejumpers on Sunday were hindered by rollout of burning material, repeatedly igniting the slope below the main fire.
Protection of life and property are key objectives for managing this fire.
Northern Rockies Complex Incident Management Team 3 assumed command of the fire on the morning of Wednesday, August 20.
Severity: warning

Size, containment, and perimeter come from the National Interagency Fire Center. Narrative comes from InciWeb. For life-threatening emergencies call 911.