The Sisi Fire, burning in the rugged wilderness of the Okanogan-Wenatchee National Forest and North Cascades National Park Service Complex, has reached 4,615 acres with 34% of its perimeter contained as of October 15, 2026, according to InciWeb. Management authority formally transferred to the North Cascades National Park Service Complex on October 13.

The fire originated on August 14, 2026, following a lightning storm near Stehekin, Washington — a remote community accessible only by boat, floatplane, or trail — presenting significant logistical challenges for firefighters throughout the season.

Current Fire Behavior

Fire activity has moderated considerably from peak conditions in late August. Current behavior shows the fire backing down steep slopes toward the Stehekin River and creeping along the Agnes Creek drainage under sheltered timber canopies. Dense fuel beds of mature Douglas fir, true fir, and ponderosa pine continue to support limited fire spread, with large snag concentrations and heavy downed fuel loads adding complexity to suppression operations.

Thirty-two personnel remain assigned to the incident — a significant reduction from peak staffing — reflecting diminished fire activity heading into late October. A full-suppression strategy remains in place with tactics focused on keeping the fire within the smallest practicable footprint while minimizing risk to firefighters and aviators.

Closures and Community Impacts

Multiple area, road, and trail closures remain in effect. The Pacific Crest Trail remains closed between the North Cascades National Park/Glacier Peak Wilderness boundary and High Bridge along the Agnes Creek corridor. Communities of Lucerne, Holden Village, and Stehekin remain in the broader fire area.

Recreationists planning fall backcountry trips in the North Cascades should verify current closure status before departure. The season’s steep, rugged terrain and persistent snag hazards make navigation through the fire area dangerous.

Management and Outlook

With the transfer of command to the North Cascades National Park Service Complex, InciWeb updates will no longer be issued daily — only when significant changes occur. The Okanogan-Wenatchee National Forest’s interactive closures map and the NPS fire closures page remain the authoritative sources for current conditions.

Seasonal cooling and increasing precipitation across the North Cascades are expected to continue suppressing fire activity through the remainder of October. Crews will continue mop-up and patrol operations to ensure the fire does not reactivate during any dry, windy periods.

  • Size: 4,615 acres
  • Containment: 34%
  • Cause: Lightning (August 14, 2026)
  • Location: 10 miles northwest of Stehekin, WA
  • Personnel: 32 assigned
  • Managing Unit: North Cascades National Park Service Complex (as of October 13, 2026)

For more information, contact the North Cascades Public Affairs Office at noca_publicaffairs@nps.gov or call (509) 682-4900.