The Pinery Fire was first reported around 1:30 p.m. Saturday afternoon. Cochise County Sheriff's Office Public Information Officer Carol Capas said a grassfire started on private land in the area of south Pinery Canyon.
About 300 firefighters are battling the blaze.
Officials believe the fire was human-caused. The exact cause is under investigation.
Since its start, the fire has moved north-east into the Coronado National Forest and Chiricahua Mountains. It is approximately 29 miles southeast of Willcox.
Crews are actively working to get the fire under control.
Several campground sites were evacuated due to the Pinery Fire. Officials have issued pre-evacuation orders for an area inclusive of about 8 homes.