Spring run salmon (IMAGE) University of California - Santa Cruz Caption Spring-run Chinook salmon, like these in Butte Creek, migrate from the ocean into freshwater early in the year and spend the summer in cool, deep pools near their spawning habitat before spawning in the fall. Credit Allen Harthorn Usage Restrictions For use only with news coverage of this research License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.