The Mosquito Fire was a large, destructive wildfire that burned near the community of Foresthill in the Tahoe and Eldorado National Forests in Placer and El Dorado counties in California, as one of the major incidents of the state's 2022 wildfire season. The fire began at approximately 6:27 p.m. PDT on September 6, 2022, near Mosquito Ridge Road (for which it was named), above Oxbow Reservoir in the Middle Fork American River drainage on the western slope of the Sierra Nevada. The fire was declared 100% contained on October 22, more than a month and a half later, well after the fire's forward progression was halted.