The Redington Fire which has consumed 125 acres since it started Saturday afternoon is now 50 percent contained.
The fire is burning in Redington Pass, east of Tucson.
Redington Pass Road is closed between milepost 5 and 17, while crews are working to suppress a human-caused fire that started Saturday afternoon.
Firefighters are using a helicopter, three heavy air tankers and an air attack plane in addition to ground crews to keep the blaze from spreading, said Heidi Schewel, spokeswoman for the Coronado National Forest.
The fire is burning about 14 miles up Redington Pass Road and no structures are threatened.
Drivers should avoid the area.
“This is an indication of how dry things are,” she said. “All it takes is an ignition source. Every human-caused fire is preventable and if everyone is careful and thinks about what they’re doing we won’t have to respond to as many wildfires and not as much public land will be affected.”
Schewel said actions as simple as a lawn mower hitting a rock, a tow chain dragging on the pavement or a ricocheting bullet from target practice could spark fires in these dry conditions.