The Decker Fire grew to more than 7,000 acres on Thursday, the Rocky Mountain Incident Management Team said.
Evacuation orders were lifted in Chaffee County on Wednesday.
The fire, which was started by lightning Sept. 8, has burned 7,034 acres and is 14% contained. It is burning 2 miles south of Salida in the Sangre de Cristo Wilderness.
A cabin on Methodist Mountain in Chaffee County has been lost as well as a structure in Fremont County.
Nearly 900 firefighters are battling the fire, which is burning in moderately stocked mixed conifer with timer litter, and moderate dead and down trees.
The estimated date for full containment is Dec. 20.
On Saturday, 300 people and 130 houses were forced to evacuate from several subdivisions, but some of those orders were lifted on Sunday afternoon.