A wildfire reported Monday burning in the Slate Creek area west of Grants Pass had consumed 120 acres by Monday evening, according to the Oregon Department of Forestry.
The cause of the Slate Creek fire outside of Wonder on Bureau of Land Management property still was under investigation late Monday and had not consumed any structures.
As of Monday night, the fire was 10 percent contained, with five helicopters and two air tankers working to bomb the fire with water and retardant.
Five bulldozers, seven engines and three firefighting crews from ODF's Grants Pass unit were constructing a fire line.
The fire is west of Highway 199 and north of Hayes Hill.
Nearby Slate Creek Road and Waters Creek Road were closed to nonemergency traffic Monday, but Highway 199 remained open as of 9 p.m.
ODF is receiving assistance from the Douglas Forest Protective Association and U.S. Forest Service, and roadblock assistance from the Josephine County Sheriff's Office.
Grants Pass Rural Fire Metro was working to protect the closest nearby structure on Slate Creek Road.
A night crew was being deployed Monday evening to continue work on the fire line, despite poor accessibility.