Kelso and the Mountain That Changed the River
Washington
Kelso sits at the confluence of the Cowlitz and Toutle rivers, and for thousands of years before a Scottish surveyor arrived, those rivers were the backbone of Cowlitz tribal territory. The Cowlitz people, divided into Upper and Lower bands speaking related Salish and Sahaptin languages, built their world around the salmon runs and the cedar forests of this valley. Their name for the volcano looming to the northeast was Lawetlat'la. Euro-American settlers renamed it Mount Saint Helens.
Peter Crawford arrived in eighteen forty-seven, staked a donation land claim along the lower Cowlitz, and eventually platted a townsite, filing the original plat in October eighteen eighty-four, which he named after his hometown of Kelso in Scotland. The Northern Pacific Railroad and later the county's timber industry brought the growth that made Kelso a city.
For more than a century, the Toutle River above Kelso flowed through a deep, forested valley, its waters cold and clear enough to support one of the strongest salmon runs in southwest Washington. Then, at eight thirty-two in the morning on May eighteenth, nineteen eighty, Mount Saint Helens erupted in the largest volcanic event in the continental United States in recorded history.
The north slope of the mountain collapsed in an instant, releasing a lateral blast and a massive lahar, a volcanic mudflow, down the North Fork of the Toutle River. About three billion cubic yards of volcanic debris buried the valley. The mudflow reached the Cowlitz River within hours and continued to the Columbia, depositing tens of millions of cubic yards of material along the way, choking the shipping channel and requiring dredging operations that continued for years.
Kelso was dozens of miles from the eruption. Residents felt the concussive shock wave and watched ash fill the sky. The Toutle's salmon runs, which had supported Indigenous fishing for millennia, were largely eliminated overnight. Forty years later, salmon have begun returning to some reaches. The Cowlitz Tribe estimates full recovery of the upper watershed may take centuries.
