The Spud fire was estimated at 4,889 acres Friday afternoon. The Eastern Idaho Interagency Fire Center said fire activity has slowed, but crews continue to work through lava rock to contain it.
Containment is now estimated for 6 p.m. Friday with Control estimated at 6 p.m. Sunday.
A lightning strike is blamed for starting the “Spud” fire, about 12 miles southwest of Carey, near Craters of the Moon National Monument at around 5:30 p.m. Thursday.
The fire is currently estimated at 2,500 acres in brush and grass. No structures are threatened.
According to BLM firefighters, the fire is burning on lava flows near Craters of the Moon, which is creating difficult conditions for firefighters. Additional thunderstorms and high winds are predicted again Friday.