This is a list of Colorado wildfires which have occurred periodically throughout its recorded history. One of the most significant fires in United States history was The Big Blowup of 1910. In that fire, 3 million acres burned and 78 firefighters were killed in the northern Rocky Mountains (in the states of Washington, Idaho, and Montana) which led to a standing policy in Colorado of all fires out by 10 am. The policy evolved over the 20th century. The Colorado State Forest Service was established by the Colorado General Assembly in 1955 and oversees response to wildfires in Colorado.