Idaho's Tartar Fire Nears Full Containment at 158,000 Acres After Threatening Weiser

The Tartar Fire burning north of Weiser, Idaho has reached 158,027 acres and approximately 89% containment as of the latest reporting — offering some of the most encouraging news in Idaho's active 2026 fire season. The blaze, which ignited July 24, threatened the city of Weiser and communities along Highway 95 during its most aggressive growth phase before crews were able to gain the upper hand.

Recent Containment Progress

Firefighters have secured lines north of the Mann Creek containment line, ensuring that section of perimeter is cold. Repair efforts on Mann Creek Road — damaged during the most intense suppression operations — are approximately 75% complete north of Mann Creek Reservoir. Over the coming days, crews will work deeper into the fire's interior to reduce the risk of spotting across established containment lines as hot and windy conditions return to the region.

How Bad It Got

At its most aggressive, the Tartar Fire surged nearly 4,000 acres in a single night, spreading toward Highway 95 and the Midvale area. Firefighters went door-to-door in Weiser neighborhoods to prepare residents for possible evacuation as the fire's trajectory became unpredictable. The city was ultimately spared, but the experience highlighted how quickly grass and rangeland fires in southwestern Idaho can move under drought conditions.

Hay and rangeland burned across the region, dealing significant blows to agricultural operations north of Weiser — a reminder that wildfire costs extend well beyond structures and extend deep into rural economies.

Idaho's Broader Fire Picture

Idaho currently has 10 large uncontained fires burning statewide, ranking third nationally behind Oregon (23) and Washington (20). Alongside the Tartar Fire, the Big Rock Fire east of Idaho Falls has burned approximately 2,142 acres and reached 85% containment.

All of Idaho remains in above-average fire risk territory through September 2026 per the latest NIFC fire potential outlook. The Idaho Panhandle faces particular risk from dry lightning events, which NWS has flagged as a primary concern for August and September. Residents in western and central Idaho should remain vigilant and stay informed through local county emergency management offices and InciWeb at inciweb.wildfire.gov.