Share this: Facebook Twitter LinkedIn SFMTA.com/16723 31 to Caltrain 13, 33 min Predictions valid as of 12:46:10 PM 4/2/2025 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 13, 33 min Downtown Prediction Unavailable Live Map