Salmon & Steelhead Recovery Tracker

Upper Willamette (Stratum)

The Upper Willamette stratum includes Willamette River watersheds in Oregon upstream of Willamette Falls, including the Clackamas River. There are seven recognized populations of spring Chinook in the Upper Willamette ESU, all of which are considered to be functionally independent, however data are currently only available in the McKenzie and Clackamas Rivers.

Oncorhynchus tshawytscha