| Sourdough Fire | |
|---|---|
 Smoke plumes from the fire seen on August 4 | |
| Date(s) | July 29, 2023 – October 1, 2023 |
| Location | North Cascades National Park Whatcom County, Washington, U.S. |
| Coordinates | 48°43′18″N 121°8′8″W / 48.72167°N 121.13556°W |
| Statistics | |
| Burned area | 6,369 acres (2,577 ha) as of September 15[1] |
| Ignition | |
| Cause | Lightning strike |
| Map | |
 Estimated perimeter of Sourdough Fire with Skagit River dams marked (map data) | |
The Sourdough Fire was a wildfire in Whatcom County, Washington, in the Pacific Northwest region of the United States. It was reported on July 29, 2023, near Sourdough Mountain in North Cascades National Park and was likely caused by an earlier lightning strike. The fire caused the closure of the North Cascades Highway (State Route 20) and evacuations of recreational facilities and three Seattle City Light hydroelectric dams in the area. As of September 15, 2023[update], the Sourdough Fire had been estimated to have burned 6,369 acres (2,577 ha) and was 25 percent contained.[1]
- ^ a b "Sourdough Fire Update". InciWeb. September 15, 2023. Retrieved September 17, 2023.