Feed checks and source-record updates do not necessarily mean fire conditions changed. Figures below reflect the last recorded incident report.
The last recorded incident change is more than 14 days old or undated. Historical fire behavior and summaries below are not confirmation of current conditions.
Automated summary generated: Oct 27, 2026 20:25 UTC. It may lag behind the report and is not an official alert.
The SINLAHEKIN wildfire, located in Okanogan County, Washington, was discovered on July 26, 2026 and is caused by natural factors under the jurisdiction of the Washington Department of Natural Resources. By early August it had burned 120,692 acres and was 20% contained, with 1,928 personnel on the scene. The fire grew to 166,868 acres by August 30, reaching 41% containment and deploying 1,690 personnel; it then stabilized around 166,000 acres with containment climbing steadily—93% by September 30, 94% by October 1, 96% by October 2, 98% by October 3, 99% by October 4, and finally 100% containment on October 15. Fire behavior evolved from active to moderate flanking and single‑tree torching, then to minimal creeping and smoldering as containment improved. The estimated cost rose from $97.6 million on August 30 to $151.95 million by October 15.
Official source description: 1 Miles W from Tonasket, WA
Minimal; Smoldering; Creeping
Historical observations from incident reports, not a live forecast. Acreage and containment can decrease when agencies correct their estimates.
62
120,692 acres
166,007 acres
Latest available source report: Oct 15, 2026 21:41 UTC. This is the report date, not confirmation of current fire conditions.
Reported acreage increased by 45,315 acres between the first and last available acreage measurements. Recorded containment rose by 80.0 percentage points, from 20.0% (Aug 6, 2026) to 100.0% (Oct 15, 2026), using the first and last reports with a known containment value.
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Aug 6, 2026 20:32 | 120,692 | 20.0% | NIFC |
| Aug 10, 2026 02:40 | 141,411 | 42.0% | NIFC |
| Aug 14, 2026 01:00 | 151,850 | 42.0% | NIFC |
| Aug 19, 2026 02:00 | 154,178 | 44.0% | NIFC |
| Aug 24, 2026 00:40 | 155,209 | 53.0% | NIFC |
| Aug 28, 2026 00:20 | 163,001 | 49.0% | NIFC |
| Sep 2, 2026 00:20 | 166,330 | 38.0% | NIFC |
| Sep 6, 2026 00:20 | 166,114 | 52.0% | NIFC |
| Sep 11, 2026 01:40 | 166,021 | 76.0% | NIFC |
| Sep 17, 2026 01:40 | 166,012 | 84.0% | NIFC |
| Oct 1, 2026 02:40 | 166,007 | 94.0% | NIFC |
| Oct 15, 2026 21:41 | 166,007 | 100.0% | NIFC |
Showing 12 representative changes from 46 distinct recorded measurements, including the first and last distinct measurements. The latest source report date is shown above, even when measurements have not changed.
| Report date (UTC) | Acres | Containment | Source |
|---|---|---|---|
| Aug 6, 2026 20:32 | 120,692 | 20.0% | NIFC |
| Aug 7, 2026 07:13 | 126,807 | 26.0% | NIFC |
| Aug 8, 2026 03:00 | 126,940 | 28.0% | NIFC |
| Aug 9, 2026 03:20 | 137,611 | 34.0% | NIFC |
| Aug 10, 2026 02:40 | 141,411 | 42.0% | NIFC |
| Aug 11, 2026 03:00 | 147,715 | 42.0% | NIFC |
| Aug 12, 2026 03:00 | 150,241 | 42.0% | NIFC |
| Aug 13, 2026 01:00 | 152,921 | 37.0% | NIFC |
| Aug 14, 2026 01:00 | 151,850 | 42.0% | NIFC |
| Aug 15, 2026 00:40 | 152,682 | 42.0% | NIFC |
| Aug 16, 2026 02:20 | 152,682 | 44.0% | NIFC |
| Aug 17, 2026 16:40 | 152,682 | 44.0% | NIFC |
| Aug 18, 2026 02:00 | 153,843 | 44.0% | NIFC |
| Aug 19, 2026 02:00 | 154,178 | 44.0% | NIFC |
| Aug 20, 2026 02:00 | 154,250 | 47.0% | NIFC |
| Aug 21, 2026 00:40 | 154,298 | 47.0% | NIFC |
| Aug 22, 2026 01:00 | 154,298 | 47.0% | NIFC |
| Aug 23, 2026 00:20 | 154,480 | 47.0% | NIFC |
| Aug 24, 2026 00:40 | 155,209 | 53.0% | NIFC |
| Aug 25, 2026 00:40 | 155,227 | 53.0% | NIFC |
| Aug 26, 2026 00:40 | 155,491 | 56.0% | NIFC |
| Aug 27, 2026 00:20 | 156,699 | 56.0% | NIFC |
| Aug 28, 2026 00:20 | 163,001 | 49.0% | NIFC |
| Aug 29, 2026 00:40 | 166,216 | 49.0% | NIFC |
| Aug 30, 2026 01:20 | 166,868 | 41.0% | NIFC |
| Aug 31, 2026 01:00 | 166,413 | 40.0% | NIFC |
| Sep 1, 2026 00:40 | 166,373 | 39.0% | NIFC |
| Sep 2, 2026 00:20 | 166,330 | 38.0% | NIFC |
| Sep 3, 2026 01:00 | 166,290 | 38.0% | NIFC |
| Sep 4, 2026 00:20 | 166,151 | 38.0% | NIFC |
| Sep 5, 2026 01:20 | 166,106 | 44.0% | NIFC |
| Sep 6, 2026 00:20 | 166,114 | 52.0% | NIFC |
| Sep 7, 2026 02:40 | 166,116 | 59.0% | NIFC |
| Sep 8, 2026 00:40 | 166,084 | 67.0% | NIFC |
| Sep 9, 2026 23:20 | 166,018 | 76.0% | NIFC |
| Sep 11, 2026 01:40 | 166,021 | 76.0% | NIFC |
| Sep 12, 2026 02:40 | 166,021 | 76.0% | NIFC |
| Sep 13, 2026 02:00 | 166,026 | 76.0% | NIFC |
| Sep 14, 2026 02:20 | 166,026 | 76.0% | NIFC |
| Sep 15, 2026 01:20 | 166,000 | 77.0% | NIFC |
| Sep 16, 2026 02:00 | 166,000 | 81.0% | NIFC |
| Sep 17, 2026 01:40 | 166,012 | 84.0% | NIFC |
| Sep 18, 2026 01:40 | 166,012 | 84.0% | NIFC |
| Sep 19, 2026 02:20 | 166,012 | 84.0% | NIFC |
| Sep 20, 2026 01:20 | 166,005 | 92.0% | NIFC |
| Sep 21, 2026 01:20 | 166,005 | 92.0% | NIFC |
| Sep 22, 2026 01:20 | 166,005 | 92.0% | NIFC |
| Sep 23, 2026 01:40 | 166,007 | 92.0% | NIFC |
| Sep 24, 2026 03:00 | 166,007 | 93.0% | NIFC |
| Sep 25, 2026 02:40 | 166,007 | 93.0% | NIFC |
| Sep 26, 2026 01:20 | 166,007 | 93.0% | NIFC |
| Sep 27, 2026 01:20 | 166,007 | 93.0% | NIFC |
| Sep 28, 2026 02:20 | 166,007 | 93.0% | NIFC |
| Sep 29, 2026 01:20 | 166,007 | 93.0% | NIFC |
| Sep 30, 2026 01:40 | 166,007 | 93.0% | NIFC |
| Oct 1, 2026 02:40 | 166,007 | 94.0% | NIFC |
| Oct 2, 2026 01:20 | 166,007 | 96.0% | NIFC |
| Oct 3, 2026 02:20 | 166,007 | 98.0% | NIFC |
| Oct 4, 2026 01:20 | 166,007 | 99.0% | NIFC |
| Oct 6, 2026 01:20 | 166,007 | 99.0% | NIFC |
| Oct 7, 2026 01:40 | 166,007 | 99.0% | NIFC |
| Oct 15, 2026 21:41 | 166,007 | 100.0% | NIFC |
Moderate air quality. Unusually sensitive individuals should consider reducing prolonged outdoor exertion.
Reporting area: Not reported. Source: AirNow.gov (EPA).
Observed: 2026-11-08 01:00:00 UTC · Site: Tonasket.
Any automated community or travel summary below may be outdated. It is not a live evacuation or road-closure notice.
Verify evacuation orders, closures and access with the responsible fire agency, county emergency management or sheriff. A containment percentage, feed status or AQI reading does not establish that an area is safe to enter.
NIFC fire information and official resources →IRWIN ID: {78D35D3B-F791-4961-AE36-C6D1A4DFF5A0}
Discovered: Jul 26, 2026
Cause: Natural
Managing Agency: DNR
Est. Cost to Date: $151,952,757
Coordinates: 48.7046, -119.6931
Other wildfires no longer present in our filtered incident feed in WA.
The SINLAHEKIN Fire has burned 166,007 acres as of October 15, 2026.
Yes, the SINLAHEKIN Fire is fully contained (100%).
The official cause has been listed as: Natural.
The SINLAHEKIN Fire is burning in Okanogan, WA.
The SINLAHEKIN Fire currently meets our U.S. incident tracking criteria. This does not confirm current fire behavior.
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