S Castro Shuttle (peak hours & game days) : termini_2 : Castro Station West Portal Station (game days) | S Castro Shuttle (peak hours & game days) : termini_1 : Embarcadero Station 4th and King Station (game days)
S Castro Shuttle running during peak hours & game days provides service between 4th and King Station and West Portal on game days and between Embarcadero and Castro otherwise.