The Tumblebug Complex Fire burned 14,570 acres (5,900 ha) of Willamette National Forest land in Lane County, Oregon, United States, from September 12, 2009 to October 2009.

[2][3] Fed by wind gusts of up to 35 miles per hour (56 km/h) and extremely dry conditions, 25 small fires caused by lightning strikes grew and spread quickly, combining to form larger fires.

Firefighters had difficulty fighting them due to the remote location and the rugged terrain, such as basalt cliffs.

[5] Firefighters had contained five percent of the fire by September 26, although it had spread to about 10,500 acres (4,200 ha).

The 1,275 firefighters then working to put out the fire had it 12 percent contained, but predicted that it would continue burning until mid-October.