Marshall Fire

The Marshall Fire was a destructive wildfire and urban conflagration that started on December 30, 2021, shortly after 11:00 a.m. MST, as a grass fire in Boulder County, Colorado. The fire caused the evacuation of 37,500 people, killed two people, and destroyed more than 1,000 structures to become the most destructive fire in Colorado history. It began in two places and was neither caused by criminal negligence nor arson.