I had got used to 2 boletes with a bright yellow pore surface on the East coast: Boletus innixus and B. auriporus. Although the picture does not really show the bright yellow, here is a third from California: Boletus flaviporus. The common name is Viscid Bolete.

Checkout the others:

Bolteus innixus: http://www.pbase.com/image/148058696

Boletus auriporus: http://www.pbase.com/image/148058837