The Trinity Ridge fire was first reported on August 3, 2012, burning in Boise National Forest, about 2 miles (3 kilometers) northwest of Featherville, Idaho. By August 29, it had burned 138,965 acres (56,237 hectares) and was 10 percent contained. Initially the fire spread rapidly northward; since mid-August much of the expansion has been toward the south.
The Advanced Land Imager (ALI) on the Earth Observing- 1 (EO-1) satellite acquired these images of the affected area on August 28, 2012. In the natural color image (top), heavy smoke streams northward. Charred vegetation appears red in the false-color image (bottom); unburned vegetation is green.
By August 23, 2012, more than 1,106,550 acres (447,802 hectares) had burned in Idaho since the beginning of the year, the second most of any state. Oregon was the only state where more land—1,186,920 acres (480,329 hectares)—had burned by the same date.