Officials say the Buck Fire, burning eight miles northeast of the Deadwood Reservoir, is now 25 percent contained.
The fire started Sunday and is believed to be human-caused.
On Thursday, almost 330 firefighters, including eleven crews and nine engines, will continue to build lines around the fire to contain it as quickly as possible, according to Boise National Forest spokeswoman Susan Blake.
Eight helicopters are also conducting water drops.
Recreationalists and those living in the area have to told to expect increased fire traffic on County Road 579. Drivers are being asked to slow down and drive with caution -- especially near Bruce Meadows, where the team is operating on both sides of the road.
“An area closure has been issued for the fire area south of County Road 579 between National Forest roads 591 and 582 to Clear Creek Summit,” Blake said. “All trails and roads within this area are closed to protect the public, especially from the danger of falling snags.”
A firefighter in a vehicle was injured Sunday by a falling snag and was released from the hospital after being treated for minor injuries.
The area closure order and map can be viewed online at http://www.fs.usda.gov/alerts/boise/alerts-notices.
