Firefighters expect to reach full containment Monday on the Coulter Creek Fire, which ignited late Sunday morning in the Missouri Heights area and quickly spread through dry fuels in steep terrain.

The Carbondale and Rural Fire Protection District was dispatched to the fire at 11:04 a.m. Sunday. Crews arrived to find flames moving rapidly through grass, pinyon, juniper and sage. Aggressive suppression efforts on the ground were supported by repeated water and retardant drops from air tankers and helicopters.

The fire grew to an estimated 115 acres by Sunday afternoon, prompting evacuation orders for nearby neighborhoods and road closures. Evacuations orders have since been lifted. As of Monday afternoon, updated mapping put the fire’s size at 107 acres with 20% containment.

One outbuilding was destroyed. No injuries have been reported, and no homes were lost. The cause of the fire remains under investigation, but officials do not believe it to be suspicious.

Evacuation orders were lifted Sunday night as the fire’s spread slowed. As of 1:50 p.m. Monday, County Road 113 remains closed between County Roads 100 and 121 but is expected to reopen later in the day.

Containment remains at 20% — a number that reflects how much of the fire’s perimeter is secured by a control line, either dug by hand or established using water. On Monday, crews focused on completing those containment lines and cold trailing the fire — a mop-up process in which firefighters carefully inspect and feel along the fire’s edge to identify and eliminate hot spots.

“There’s no threat to structures at this point,” Carbondale Fire Public Information Officer Jenny Cutright said. “The work done on the ground and from the air really made the difference. We had what we’d call an ‘air show’ yesterday — those pilots were amazing. The drops they made were spot on and key to stopping the fire’s spread.”

Air resources are no longer being used, but fire crews will remain in the area in the coming days to monitor conditions and ensure the fire does not reignite.

Agencies assisting in the response Monday include Roaring Fork Fire Rescue, Colorado River Fire Rescue, the Upper Colorado River Interagency Fire Management Unit, the Bereau of Land Management, and the Alpine Pacific hand crew.