Alameda Creek

Alameda Creek is the largest local tributary to the San Francisco Bay, with a nearly 700 square mile watershed. It hosts the most biodiverse fish assemblage in the East Bay. Once home to large runs of Chinook and Coho Salmon, and Steelhead, human activities including dams and channelization led to those runs disappearing. Since 1998, over 20 fish passage barriers have been removed or remediated with the largest completed in 2023. Steelhead and Chinook Salmon immediately started using the passage structure to move upstream into the rest of the watershed. 

The Alameda Creek watershed includes Upper Alameda Creek, La Costa Creek, Indian Creek, Arroyo Hondo, Lower Alameda Creek, Lower Calaveras Creek, and Stonybrook Creek.