Jeff Miller, director of the Alameda Creek Alliance, looks down to where Alameda Creek flows through Sunol Regional Wilderness on Wednesday, February 10, 2010.State officials decided it was time to ban fishing downstream from the San Antonio, Calaveras and Del Valle reservoirs. The decision is an attempt to protect threatened steelhead trout and remnant populations of native rainbow trout. Steelhead, coho and chinook salmon once swam up Alameda Creek in huge numbers, but dams and various blockages and diversions cut off their migratory route. Photo: Carlos Avila Gonzalez, The Chronicle