2026 Jefferson County, Idaho Wildfires

United States › Idaho › Jefferson County

0 Active Fires
0 Acres Burning
1 2026 Season Fires ▲ +1 vs same period last year
1,451 2026 Season Acres ▲ +1,451 vs same period last year

Newest wildfires in Jefferson County

Jul 31 Started 2,142 acres 1.8x the size of Lincoln Park Big Rock Fire

Largest wildfires in Jefferson County this season

2,142 Acres 1.8x the size of Lincoln Park Big Rock Fire Ririe

All 2026 Jefferson County Fires · 1 fires

A fire is listed here when it is located in Jefferson 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 Jefferson County, not its whole reported size. A fire located elsewhere that burned into Jefferson County is listed too, at its Jefferson County acres, and is not added to the Jefferson County fire counts. County lines come from a different boundary dataset than state lines, so Jefferson 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
Big Rock Fire Jul 31, 2026 100% Inactive 1,451 of 2,142 43.6519, -111.6788 43.6432, -111.7001
Totals 2026 Season Fires 1 Active Fires 0 Acres Burning 0 2026 Season Acres 1,451

Land cover · Jefferson County 2026

Burned acres in Jefferson County for the 2026 season, split by the kind of land that burned. Each figure counts the LANDFIRE 30 m cells inside a fire's latest mapped perimeter. The Fires tab carries the reported season acreage.

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Acres by cover type Acres in Jefferson County % of burned % of Jefferson County
Forest 555 38.3% 1.0%
Range (shrubland) 855 58.9% 55.5%
Grassland 16 1.1% 8.9%
Other 25 1.7% 34.6%
Measured acres in Jefferson County 1,452 — —
Measured fires
Fire Reported acres Acres in Jefferson County Forest Range (shrubland) Grassland Other Unclassified
Big Rock Fire 2,142 1,452 (of 2,141) 555 855 16 25 0
Reconciliation
Line Fires Acres
Counted fires 1 2,142
Offered to measurement 1 2,142
Complex roll-up residue — 0
Fires with cells 1 2,142
Awaiting a perimeter 0 0
Awaiting measurement 0 0
Measurement errors 0 0
Smaller than one cell 0 0
Every cell outside Jefferson County 0 0
Measured acres in Jefferson County 1 1,452
Measured acres outside Jefferson County — 689
Whole perimeter acres — 2,141
Reported minus measured — 1
Burned in from another county 0 0

Forest ownership · Jefferson County 2026

Burned forest acres in Jefferson County for the 2026 season, split by who owns the land. Owners are mapped for forestland, so every figure here counts burned cells whose LANDFIRE lifeform is Tree. The Fires tab carries the season acreage this site reports.

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Burned forest by owner Forest acres in Jefferson County % of burned forest % of Jefferson County's forestland
Public 27 4.9% 58.6%
Federal 26 4.7% 39.6%
State 1 0.2% 19.0%
Local (county, city) 0 0.0% 0.0%
Tribal 0 0.0% 0.0%
Tribal 0 0.0% 0.0%
Private 47 8.5% 41.4%
Family 47 8.5% 41.4%
Corporate 0 0.0% 0.0%
TIMO/REIT 0 0.0% 0.0%
Other private 0 0.0% 0.0%
Ownership not modeled 481 86.7% —
Burned forest in Jefferson County 555 — —
Fires by owner
Fire Forest acres in Jefferson County Federal State Local Tribal Private Not modeled
Big Rock Fire 555 26 1 0 0 47 481

0 measured fires burned zero forest cells.

Reconciliation
Owner cells 2,497 555
Land cover Forest cells 2,497 555
Equal 2,497

Search Fires

🔥 Big Rock Fire 2026
Started: Jul 31 2,142 acre 100% contained
Near Ririe · Jefferson County, Idaho