Share this: Facebook Twitter LinkedIn www.sfmta.com/14495 31 to Caltrain 4, 25 min 31 Balboa arrives in 4 minutes. Predictions valid as of 4:31:20 PM 5/14/2025 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 4, 25 min Downtown Prediction Unavailable Live Map