Firefighters in Colorado are planning an evacuation zone along the Black Canyon of the Gunnison National Park's North Rim as part of their continuing efforts to bring the South Rim Fire under control.

Fire crews increased containment on the 2,274-acre Sowbelly fire to 50% as of Saturday morning, according to federal fire maps.

Fire crews working across western Colorado made more progress containing and slowing the growth of several wildfires Thursday.