Mill Creek, Northern California (IMAGE) University of California - Davis Caption Mill Creek, a spring-fed creek that flows from the base of Mt. Lassen to the Sacramento Valley, is an important cold-water stream. Credit Ann Willis/UC Davis Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.