2025 Lassen County, California Wildfires

0 Active Fires

0 Acres Burning

9 2025 Season Fires ▲ +7 vs same period last year

1,112 2025 Season Acres ▲ +1,078 vs same period last year

Newest wildfires in Lassen County

Sep 8 Started 20 acres 15 football fields Lake Fire

Aug 29 Started 14 acres 11 football fields South Constantia Fire

Aug 26 Started 24 acres 18 football fields 3-27 Fire

Aug 25 Started 39 acres 30 football fields 3-22 Muck Fire

Aug 25 Started 100 acres 77 football fields R-10 Fire

Aug 24 Started 500 acres 59% the size of Central Park 385 football fields R-3 Fire

Largest wildfires in Lassen County this season

500 Acres 59% the size of Central Park 385 football fields R-3 Fire Susanville

259 Acres 199 football fields 1-4 Fire Susanville

106 Acres 82 football fields Byers Fire Janesville

100 Acres 77 football fields R-10 Fire Susanville

50 Acres 38 football fields Clark Fire Fall River Mills

39 Acres 30 football fields 3-22 Muck Fire Burney

All 2025 Lassen County Fires · 9 fires

A fire is listed here when it is located in Lassen County. Each complex is counted once, through its parent: the parent carries the complex's acres, and its member fires are listed beneath it without being counted again. A fire that crossed a county line is listed with the acres that burned in Lassen County, not its whole reported size. A fire located elsewhere that burned into Lassen County is listed too, at its Lassen County acres, and is not added to the Lassen County fire counts. County lines come from a different boundary dataset than state lines, so Lassen County's acres are counted along county lines and can differ a little at the edges from the figures on the state page.

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Fire	Start date	Containment	Status	Acres	Center	Ignition point
R-3 Fire	Aug 24, 2025	100%	Inactive	500	40.4472, -120.4838	40.4358, -120.4773
1-4 Fire	Aug 1, 2025	—	Inactive	259	40.4438, -120.6563	—
Byers Fire	Jun 4, 2025	—	Inactive	106	40.3331, -120.4706	—
R-10 Fire	Aug 25, 2025	100%	Inactive	100	40.6780, -120.2400	—
Clark Fire	Aug 11, 2025	—	Inactive	50	40.9180, -121.1704	—
3-22 Muck Fire	Aug 25, 2025	90%	Inactive	39	40.9770, -121.2280	—
3-27 Fire	Aug 26, 2025	75%	Inactive	24	41.0890, -121.0570	—
Lake Fire	Sep 8, 2025	—	Inactive	20	40.3760, -120.4880	—
South Constantia Fire	Aug 29, 2025	100%	Inactive	14	39.9410, -120.0050	—
Totals	2025 Season Fires 9	Active Fires 0	Acres Burning 0	2025 Season Acres 1,112