Share this: Facebook Twitter LinkedIn SFMTA.com/16713 31 to Caltrain 3, 24 min 31 Balboa arrives in 3 minutes. Predictions valid as of 3:41:12 PM 4/7/2025 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 3, 24 min Downtown Prediction Unavailable Live Map