A new wildfire west of Red Feathers Lakes has prompted mandatory evacuations for some residents in Larimer County Thursday.

The Derby Fire is moving quickly in Garfield and Eagle counties, burning almost 1,000 acres between Wednesday night and Thursday morning.

The Derby Fire burning in rugged terrain in the northwest corner of Eagle County is estimated at 2,625 acres and is 0% contained as of 9 a.m. Thursday. While acreage has nearly doubled since

The two fires are called the Derby Fire, located in Eagle County near Garfield County, and the La Plata Fire, located in Chaffee and Lake counties in the Pike-San Isabel National Forests.

The Eagle Fire Department said the RA 12 Ada CO. has burned roughly 20 acres, but there are no confirmed evacuations at this time. Fire crews, including the Middletown Star firefighters, are on the scene battling the fire. "Please avoid the area while firefighters continue operations," Eagle Fire said.

On August 18, 2025, a 100-acre grass fire, dubbed the RA 12 Ada CO Fire, erupted in the Eagle Foothills, Idaho, northwest of Beacon Light Rd and Hwy 55, prompting Level 3 “Go Now” evacuation orders for residents between Holl Dr and Brookside Lann,