The Pine Creek Fire, approximately 15 miles northeast of Boise, has now grown to 1,500 acres but is still only 10 percent contained.
Flames were whipped July 16 by winds gusting to 40 mph.
Approximately 240 firefighters are working the fire lines today, in addition to four more helicopters flown in for fire suppression. Fire managers say they will work primarily on securing fire lines on the eastern, southern and western flanks.
Grimes Creek Road is open to local traffic, but officials say the roadway could be closed at any time due to possible danger of rolling rocks and falling limbs.
Travelers along Highway 21 are again cautioned about smoky conditions.
The Pine Creek Fire started at about 3 p.m. on July 15, three miles north of Highway 21 off Grimes Creek Road in the vicinity of Pine Creek Road. It is burning east from Grimes Creek Road and crossed Casner Mountain late that day in the Warm Springs Ridge area on the Boise National Forest. The cause of the fire is under investigation, but is believed to be human caused.
Lightning overnight sparked at least eight new fires across the Idaho Department of Lands Southwest Forest Protective District and the Boise National Forest. They range in size from 50 acres to less than one acre. Many of the new fires have been staffed, but fire managers will be looking for new starts throughout the day.