Yesterday, while assisting EBRP staff as a  Alameda Creek Alliance volunteer,  I notice nesting Cliff Swallow on the Bart train trestle which is over the Alameda Creek (south east of Quarry EBRP). The nests are on the west facing side of the trestle. Also present were several Tree Swallows,two Barn Swallow and a single Northern Rough-wing Swallow.
Enjoy the warm weekend.
Rich Cimino
Larkspur