The Buck Fire, about eight miles east of Deadwood Reservoir, has now grown to over 300 acres, according to Boise National Forest officials.
The reservoir is east of Smiths Ferry.
When firefighters arrived on scene Sunday morning, the fire was only about eight acres.
A firefighter was injured by a falling snag while working on the fire. He was airlifted to St. Alphonsus Hospital in Boise. He received minor injuries and should be released soon, according to Boise National Forest spokeswoman Linda Steinhaus.
“At this time, no lives or property are threatened. The smoke has not impacted area roads because of the fire’s remote location,” she added.
An area and road closure are pending. National Forest road 563 has been temporarily closed for the health and safety of the public and Forest officials may be implementing area closures at the junctions of County Road 579 and National Forest roads 582, 591, 510 and 563, Steinhaus said.
About 150 firefighters are battling the flames. Several helicopters are also in the area, dropping retardant and evaluating the fire's perimeter.
More resources have been ordered.