A short history of Sumas
The area was home to the Nooksack Indians in the millennia prior to the arrival of the first permanent settler Robert Johnson in 1872.
It was called "Sumas" meaning "land without trees" or "big flat opening." It is derived from a Cowichan tribe who also resided in the region.
Originally called "Sumas City," the town was officially incorporated on June 18, 1891. A post office with that name has been in operation since 1897.
The town was a railroad hub and briefly supported the Mount Baker Gold Rush, with some gold mining operations still ongoing in the area such as at Lone Jack mine. It was also known for a large rodeo in the early 20th Century, the "Sumas Roundup."
The area around Sumas drains into the Fraser River in Canada, in a broad floodplain. Floods from the Nooksack and Fraser rivers have been recorded ever since the area was settled. Although not the largest flood to have occurred prior to 1990, the November 10 flood received notoriety as it caused millions of dollars in damage.
On November 15, 2021, another regional flood event resulted in catastrophic flooding in Sumas. Approximately 85 percent of homes in the city were damaged and hundreds of residents were rescued after a partial evacuation.
Sumas was one of the cities hit by the 2025 Pacific Northwest floods. Residents were told to evacuate on Wednesday, December 10.
Adapted (trimmed) from the Wikipedia article Sumas, Washington, revision 1379976740 by its contributors, licensed CC BY-SA 4.0.