Two massive wildfires that shaped Washington State’s unprecedented 2026 fire season are nearing full containment, with crews transitioning from active suppression to mop-up and rehabilitation work across scorched landscapes in Chelan and Okanogan counties.

Little Giant Fire: 172,902 Acres, 93% Contained

The Little Giant Fire, burning in the Okanogan-Wenatchee National Forest roughly 30 miles northwest of Leavenworth, remains the most closely watched incident in Washington. The fire ignited via lightning on July 15, 2026, and grew explosively through the summer before crews gained the upper hand in September.

As of October 4, the fire stood at 172,902 acres and 93% contained, according to the NIFC Incident Management Situation Report. Moderate fire behavior with creeping and smoldering continues in isolated pockets. Structures remain threatened in some areas and area, road, and trail closures remain in effect. A Complex Incident Management Team (CIMT — NW Team 12) is managing the incident alongside the adjacent Sisi Fire.

Post-fire assessment teams have begun work in the burn scar, evaluating erosion risk, watershed impacts, and the threat to downstream communities. According to the Spokane Spokesman-Review, the lightning-caused fire is one of the largest single fires in Chelan County history.

Sinlahekin Fire: 166,007 Acres, 99% Contained

The Sinlahekin Fire, managed by Washington State Department of Natural Resources, is essentially controlled after burning 166,007 acres west of Tonasket in Okanogan County. The fire started July 26 via lightning and at its peak threatened rural communities and recreation areas in the Sinlahekin Wildlife Area.

With containment now at 99%, the DNR has shifted to patrol and mop-up operations. The fire information line at 509-287-4942 remains active for public inquiries. A final incident review is expected in coming weeks as suppression repair work continues across the landscape.

Post-Fire Recovery Underway

With both fires substantially contained, attention is turning to recovery. The combined footprint of these two fires exceeds 338,000 acres — more than 500 square miles — of Okanogan and Chelan County forestland and shrub-steppe. Officials are evaluating risks for:

  • Post-fire flooding and debris flows during fall rain events
  • Erosion on steep slopes within the burn perimeters
  • Tree mortality and hazard tree removal along roads and trails
  • Long-term habitat and watershed recovery

Residents in affected areas are encouraged to remain cautious during precipitation events, as burned slopes can produce flash flooding and debris flows with little warning. Emergency managers recommend signing up for local emergency alert systems to stay informed.