The fire — called the Twelve fire on the Bureau of Land Management’s fire dashboard — burned across 1,000 acres over the course of five hours Wednesday after sparking in Moffat County near Elk Springs, about 50 miles west of Craig, according to federal officials.

Four fires burning on Colorado’s Western Slope have spread to more than 31,000 acres and forced ongoing evacuations, fire officials said Wednesday.

Wildfires burning on Colorado's western slope as of Aug. 5 are contributing to hazy skies in Fort Collins as the smoke moves east.