The Forest Service is treating about 5,000 acres on the Coconino National Forest this week with prescribed burns northwest of Flagstaff.
Smoke impacts are anticipated along the popular Highway 180, which runs on the west side of the San Francisco Peaks. The region is a major focus of forest treatment operations, as officials are concerned about devastating wildfires on the mountains.
The agency said the Wolf Fire, which started as the result of a lightning strike last month that then was used to engineer a prescribed burn, has been completed ahead of incoming rains this week. A closure order is still in effect. That fire treated about 10,000 acres.