No longer in the daily fire updates. The Big Rock Fire last appeared in an official report on August 13, at 2,142 acres and 100% contained. Fires drop off this list once crews have them contained or out; we keep the page for reference. See fires burning now →

Big Rock Fire

Jefferson County, Idaho · Wildfire

No longer active Official numbers updated Aug 13, 2026 (4 days ago)
First reported about 2 weeks ago
Metric Now
Size
2,142 acres
Aug 17, 11:00 AM
−7 acres
was 2,149 acres · Aug 6, 5:00 PM
Containment
100%
Aug 17, 11:00 AM
+3 percent
was 97% · Aug 13, 5:00 PM
Crew size
3
Aug 17, 11:00 AM
−62
was 65 · Aug 13, 5:00 PM
Money spent
$3.5M
Aug 17, 11:00 AM
+$15,000
was $3.5M · Aug 13, 5:00 PM

Big Rock Fire and other nearby fires

🔥 Where this fire started Mostly contained Partly contained Containment not reported

Drag or zoom the map to see more fires in the area.

Big Rock Fire summary

The Big Rock Fire is a wildfire near Jefferson County, Idaho. It has burned about 2,142 acres (about 2,000 football fields). Crews have it fully contained, with a line all the way around it. It was first reported about 2 weeks ago. About 3 people are on it, run by a Type 5 IC.

Size
2,142 acres
Containment
100%
Discovered
July 31, 2026 (first reported about 2 weeks ago)
Cause
Not reported

The size and containment above are current as of Friday, August 14th at 11:01 a.m. CDT.

Weather & fire-spread conditions

No Red Flag Warning. The National Weather Service hasn't flagged this area for dangerous fire-spread conditions right now.

Hot, dry, and windy weather can help a fire grow; cool, calm, or wet weather helps crews. The tags below rate each day for fire spread — green is calm, red can push a fire.

A general fire-weather guide (wind matters most, then how dry it is, then heat), not a prediction of what this fire will do.

Today

73°F · Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely

Wind 9 mph SSW · 65% chance of rain

Wind: Calm Heat: Cool Rain likely

Tonight

52°F · Chance Showers And Thunderstorms then Mostly Cloudy

Wind 7 mph ESE · 38% chance of rain

Wind: Calm Heat: Cool Some rain

Saturday

76°F · Slight Chance Light Rain then Chance Showers And Thunderstorms

Wind 5 to 8 mph S · 54% chance of rain

Wind: Calm Heat: Warm Rain likely

Saturday Night

52°F · Slight Chance Showers And Thunderstorms then Mostly Clear

Wind 7 mph SE · 20% chance of rain

Wind: Calm Heat: Cool Some rain

Sunday

81°F · Sunny

Wind 3 to 9 mph S · 2% chance of rain

Wind: Calm Heat: Warm Dry

Forecast from the National Weather Service (weather.gov), pulled Friday, August 14th at 11:04 a.m. CDT.

Who's on it

About 3 people are assigned to this fire, run by a Type 5 IC. The government rates it a Type 2 Incident. About $4 million has been spent on it so far.

The official feed reports the total headcount, not a breakdown by crew type.

Where to get live updates

We show the daily official picture. For minute-by-minute updates, evacuation orders, and maps, these do it best:

Nearby fires to Big Rock Fire

No other active fires are near this one right now. It's on its own.

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