Share this: Facebook Twitter LinkedIn www.sfmta.com/16709 31 to Caltrain 15, 35 min Predictions valid as of 11:02:36 PM 5/19/2025 min Arriving Prediction Unavailable Stop closed — no service Predictions valid as of Predictions unavailable for any route as of Route & Arrival Details 31 Balboa 5 a.m. to 10 p.m. daily Destination Predicted Arrivals Caltrain 15, 35 min Downtown Prediction Unavailable Masonic + Turk Prediction Unavailable 31BX Balboa B Express Live Map