CLEAR CREEK COUNTY, Colo. (CBS4)- Firefighters say lightning caused a fire to start near Idaho Springs in Clear Creek County.

Devil’s Canyon Fire burning in Clear Creek County. (credit: Forest Service, ARP)

The U.S. Forest Service says the Devil’s Canyon Fire is about a tenth of an acre off Highway 103.

No structures are threatened, and a small aircraft is fighting the fire with retardant.