Upper Smith Fire

Situation Summary

Automated summary generated: Oct 26, 2026 23:05 UTC. It may lag behind the report and is not an official alert.

The Upper Smith wildfire, located in Boundary County, Idaho, was first discovered on July 8, 2026, and is caused by natural factors under the jurisdiction of the USFS. By early August, the fire had expanded to 2,305 acres with 41% containment, but grew rapidly to 3,547 acres by August 11, when containment fell to 30% and fire behavior intensified to moderate, flanking, torching, and creeping. The blaze continued to spread, reaching 4,848 acres by September 5, where containment improved to 41% and behavior shifted to minimal, backing, creeping, and smoldering. From September onward, the fire size remained steady at 4,848 acres while containment held at 41% until October 26, when the fire was fully contained at 100% with minimal, smoldering, creeping, and backing behavior.

Official source description: 6 Miles W from Porthill, ID

Recorded Fire Progression

Historical observations from incident reports, not a live forecast. Acreage and containment can decrease when agencies correct their estimates.

Latest available source report: Oct 26, 2026 22:49 UTC. This is the report date, not confirmation of current fire conditions.

Reported acreage increased by 2,543 acres between the first and last available acreage measurements. Recorded containment rose by 59.0 percentage points, from 41.0% (Aug 6, 2026) to 100.0% (Oct 26, 2026), using the first and last reports with a known containment value.

Reported changes over time

Showing 12 representative changes from 23 distinct recorded measurements, including the first and last distinct measurements. The latest source report date is shown above, even when measurements have not changed.