"The Upper Smith fire’s rapid expansion to nearly 5,000 acres and sustained moderate activity over several weeks highlights the challenges of managing natural fires in remote Idaho terrain, especially given the significant personnel and cost commitments. "
The Upper Smith wildfire, located in Boundary County, Idaho, was first discovered on July 8, 2026, and is a natural fire under the jurisdiction of the USFS. By early August, the blaze had expanded to 2,305 acres with 41% containment and 197 personnel on the scene. Over the next month the fire grew steadily, peaking at 4,848 acres on September 5, 2026, while containment hovered around 41% and personnel fluctuated between 34 and 141. Fire behavior varied from minimal and smoldering to moderate and running, with occasional torching and flanking activity. The incident remains active, with the latest report on September 13 indicating 4,848 acres, 41% containment, and minimal behavior.
Official source description: 6 Miles W from Porthill, ID
Minimal; Smoldering
Good air quality. Outdoor activity is generally safe near this incident.
Nearest reporting station: Porthill (seasonal). Source: AirNow.gov (EPA).
Given the current minimal fire behavior and 41% containment, general wildfire safety precautions apply: stay informed of local advisories, avoid the fire perimeter, and be prepared for potential changes in activity.
IRWIN ID: {AA3DF707-B3F6-41B8-A5FF-BF502A918FFC}
Discovered: Jul 8, 2026
Cause: Natural
Managing Agency: USFS
Est. Cost to Date: $33,077,508
Coordinates: 48.9275, -116.6078
Other wildfires that have recently been contained or dropped from official tracking in ID.
The Upper Smith Fire has burned 4,848 acres as of September 13, 2026.
As of the latest update, the Upper Smith Fire is 41% contained.
The official cause has been listed as: Natural.
The Upper Smith Fire is burning in Boundary, ID.
Yes, as of the latest official update, the Upper Smith Fire remains active.
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