Santa Clara River (IMAGE) University of Cincinnati Caption The Santa Clara River in southern California is home to a migratory population of trout called steelhead. Until recently, scientists were not sure what triggered steelhead to make the dangerous trip to the Pacific Ocean. Credit Michael Booth Usage Restrictions None 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.