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Executive Summary: "Since the spring of 2002 the Yurok Tribal Fisheries Program has led a collaborative biotelemetry study of adult Chinook salmon (Oncorhynchus tshawytscha) migration in the Klamath River Basin (KRB). The overarching goal of this research project is to comprehensively determine and understand adult Chinook salmon migration behavior in the KRB throughout the spectrum of run-timing. Specific components include determining migration rates, thermal experience, estuary residence, run-timing, migration behavior patterns, and behavioral responses to environmental variables such as water temperature and river flow. Many of these goals have been accomplished with results from previous study years and publications are under development. This report describes and summarizes results from the 2007 study year, which was the first study year with a focus shifted from research to monitoring. During 2007 a total of 62 adult Chinook salmon were tagged at the terminus of the Klamath River with the Pacific Ocean from 8/30/2007 to 9/26/2007 with esophageal ultrasonic transmitters, coupled with an archival temperature device that recorded fish body temperature every hour for the duration of their migration. Adipose and non-adipose fin clipped fish were tagged without bias, each fish was externally marked with a jaw tag, and rayed fin tissue samples were collected for later genetic analysis." [...] Additional keywords: telemetry