Northern Rockies Complex Incident Management Team 3

Derby Fire Quick Facts: August 28, 2025
Total acreage: 5,723 acres
4% contained
824 personnel

Firefighters continue to strengthen control line along the southeastern side of the fire. Within the fire footprint, smoke may be visible as sunlight rekindles isolated areas of smoldering timber. The mix of wetting and drying weather, varying winds, and patchwork fuel types lead to inconsistent fuel consumption across the incident. The rock outcrop in the rear of the photo is near the fire origin.

Photo: Looking northwest from Sugarloaf Mountain on the southeast side of the Derby Fire. S.Rawding/Derby Fire.