A fire burning about 18 miles south of Silver City has grown to more than 1,300 acres since Thursday evening.
The Boise District Bureau of Land Management has 60 personnel assigned to the Josie Fire, which is burning in grass and sage on private and state-managed land.
The fire was ten-percent contained as of Saturday morning.
The BLM expects cooler temperatures to help firefighters make significant progress Saturday and Sunday.
The BLM says the fire is human caused, and is under investigation.