The Emigrant Fire, which was first reported Sunday afternoon in southeast Lane County, has grown to an estimated 3,500 acres.
The Willamette National Forest said sustained hot, dry and unstable weather conditions contributed to significant fire growth Monday.
The Emigrant Fire was one of several that sparked in Oregon forests over the weekend amidst hot, dry windy conditions and lightning storms across the central cascades. The fire is burning in a remote area, about three miles southwest of Indigo Springs Campground across steep slopes.
The campground is tent-only, with just three sites and is located about 31 miles southeast of Oakridge.
According to a news release Monday morning from the Willamette National Forest, fire crews, air support and other large equipment have been sent to the fire. On Monday fire crews scouted areas to safely construct a fire line and improve existing lines that were created in 2009, when the Tumblebug Fire burned the same area.