The Galena Fire has burned about 1,348 acres in the foothills west of Fort Collins according to new mapping information released Monday morning.
The fire, which started Friday, remains about 75 percent contained and firefighters expect to increase containment by the end of the day, according to the Larimer County Sheriff's Office.
Two firefighters are recovering from minor injuries suffered during containment efforts, Larimer County officials confirmed. Both were hospitalized and released.
Authorities said the fire appears to be human-caused, but they have not disclosed how it began.
About 130 firefighters remain on the fire, and two helicopters will go to work Monday if weather conditions permit.
Winds in the area could gust up to 31 mph Monday, according to the National Weather Service, and strong winds could hamper firefighters' efforts. Winds will likely increase smoke in the interior of the fire.
No structures have been lost or damaged by the fire.
Crews plan to work on fire lines Monday, along with mop-up in some areas. So far, firefighters have dug about five miles of fire line.
An investigation into the cause of the fire is ongoing, but officials said Monday that it was human-caused. Further details on the cause will be released as soon as possible, the sheriff's office said.