Firefighters say they expect to get the Hilltop Fire, burning between Idaho Highway 21 and Lucky Peak Reservoir, to be under control by Thursday, Aug. 8.
The human-caused blaze sparked Aug. 6, burning about 1,000 acres of grass and sagebrush, fed by high winds and steep terrain.
Meanwhile, the region's largest wildfire—the Lodgepole Fire—burning 10 miles west of Challis has scorched 20,000 acres.
The lightning-caused wildfire has been burning since July 20 and is now 40 percent contained. More than 600 firefighting personnel are currently assigned to the Lodgepole blaze.
Fire managers are keeping a close eye on the forecast, which calls for thunderstorms and windy conditions late in the day Aug. 8.