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Mosquito Fire

Unit Information

Tahoe National Forest
U.S. Forest Service
13120 Loma Rica Grass Valley California 95945
Nevada City, CA 95959

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Incident Contacts

Local Fire Information: 211
Phone: 530-264-8309
Hours: 8 a.m. - 8 p.m., daily

Fire Information--Media Line
Phone: 530-217-3263
Hours: 8 a.m. - 8 p.m., daily

Highlighted Activity

10/01/2022 Mosquito Fire Update -10/1/22
Size: 76,788 acres Containment: 90%Total Personnel: 1,628 CURRENT SITUATION On Friday, favorable weather provided crews on the Mosquito Fire an opportunity to make extensive progress on the...
News - 10/01/2022
map showing the perimeter of the fire over a topographical backgroundImage options: [ Full Size ]

California Interagency Incident Management Team 2 assumed command of the Mosquito fire at 0700 on Friday, 9/23/2022.
Evacuations and Repopulation:

As of Friday, September 23, all evacuation orders in both Placer and El Dorado counties have been lifted. (El Dorado County evacuation map).

Other Resources:

Mosquito Fire meeting and briefing videos: YouTube

Mosquito Fire photos and videos: Media Assets

Tahoe National Forest: Closure Orders & Maps | Fire Restrictions | Facebook | Twitter

Eldorado National Forest: Closure Orders & Maps | Fire Restrictions | Facebook | Twitter 

Placer County: Mosquito Fire Information | Facebook | Twitter | Post-Fire Recovery 

El Dorado County: Mosquito Fire Information | Facebook | Twitter | Post-Fire Assistance 


The Mosquito Fire was detected the evening of Tuesday, September 6, and has been burning east of Foresthill, California, predominantly on the Tahoe and Eldorado National Forests in Placer and El Dorado counties, respectively. Numerous areas and communities were under evacuation orders and warnings. As of Wednesday, September 21, all orders have been lifted. Road closures, National Forest closures, and fire restrictions are in effect. California Interagency Incident Management Team 2 assumed command of the Mosquito fire at 0700 on Friday, 9/23/2022. 

Basic Information

Current as of
Incident TypeWildfire
CauseUnder Investigation
Date of OriginTuesday September 06th, 2022 approx. 06:27 PM
Location4 miles East of Foresthill, California.
Incident CommanderNickie Johnny (CIIMT 2)
Coordinates39.006 latitude, -120.745 longitude

Current Situation

Total Personnel1,540
Size76,788 Acres
Percent of Perimeter Contained90%
Fuels Involved

Timber (Grass and Understory)

Chaparral (6 feet)

Timber (Litter and Understory)

Significant Events





Planned Actions

Construct direct and indirect line as conditions and opportunities allow. Hold, patrol, improve, and mop-up existing containment lines. Perform hazard tree abatement, and suppression repair.

Projected Incident Activity

12-hour time frame:

Heavier burning fuels may have potential to retain heat and create flare ups. Fire growth will be minimal. Suppression repair efforts are underway in areas of the fire that are no longer posing a potential risk of escape.

24-hour time frame:

Conditions will trend warm and dry allowing finer, smaller fuels to dry. Any heavier fuels with remaining heat will have potential to rekindle and create flare ups. Fire growth will be minimal. Suppression repair efforts are underway in areas of the fire that are no longer posing a potential risk of escape.

Current Weather

Weather Concerns

An upper level ridge will continue to build into Northern California through early next week and remain in place for much of the upcoming week. This will lead to continued mostly clear skies with temperatures remaining a few degrees above normal through the weekend and into early next week. Humidity should bottom out mainly in the 20s for the next several days with moderate overnight recoveries and mainly terrain and diurnally driven winds.

Humidity peaked by 2300 before midnight on Friday evening and then gradually fell into the 34 to 44% range overnight as winds on the ridges became east to northeast with gusts up to 15 mph before dawn. Skies were mostly sunny today. After a start in the upper 50s to low 60s, temperatures rose into the upper 70s to low 80s. Minimum rh was generally in the 21 to 29% range this afternoon. Winds were east to southeast at 3 to 7 mph on the ridges and down canyon 3 to 6 mph during the morning, with ridgetop winds becoming southwest to west during the midday to afternoon with gusts up to 12 mph. Otherwise winds were upslope or up canyon at 3 to 6 mph during the afternoon with gusts up to 8 mph.

Mostly clear skies are expected as high pressure building in from the Pacific dominants. Humidity recovery tonight will remain in the moderate range, but will be about 8% lower than Thursday night. Wind gusts from the east to northeast up to 14 mph are anticipated on the ridgetops late tonight. Otherwise, highs on Saturday through early next week will again be about 3 to 4 degrees above normal, ranging in the upper 70s to mid 80s. Humidity is expected to bottom out in the 21 to 28% range each afternoon with moderate recoveries each night. Southwest to west ridge winds gusting up to 12 mph are anticipated from midday into the afternoon for the next several days.