Rush Fire was the largest wildfire of the 2012 California wildfire season . The fire , which started in Lassen County , California , eventually spread into Washoe County , Nevada . The fire consumed a total of of sagebrush , of which were in California . At the time , the burn area in California made the Rush Fire the second-largest wildfire in California since 1932 ( when accurate area estimates became available ) . In December 2017 , the Thomas Fire surpassed the Rush Fire to become the second-largest wildfire in modern California history , in terms of the area burned in California . In mid-August 2018 , the Ranch Fire in the Mendocino Complex Fire surpassed the total acreage of the Rush Fire in both California and Nevada
Mendocino Complex Fire
Mendocino Complex Fire
Rush Fire