Since July 3, the Billy Creek Fire has spread from 150 acres to 3,200 acres just east of the Idaho-Washington border.
Fire crews from the Idaho Department of Lands initially responded to the site alongside local firefighters, but official management shifted to a complex incident team on Sunday.
On Monday, managers reported containment increased from 10% to 33%, and recent fire growth was minimal.
But Northern Rockies Incident Management Team 1 Fire Information Officer Christopher Joyner said there is still work to be done.
“When we rule the fire contained, we're looking for that fire to be contained. We've not reached that. Even if the public going by is not seeing smoke, there's still activity there,” Joyner said in an interview. A total of 150 personnel across the partnering agencies are currently on scene.