No, the BART (Bay Area Rapid Transit) is not an all-night service in 2026. On weekdays, service typically runs from 5:00 AM to midnight; Saturdays start later at 6:00 AM, and Sundays at 8:00 AM. After midnight, the system shuts down for critical maintenance and track inspections. For travelers landing at SFO or OAK late at night, the "blue buses" or ride-shares like Uber/Lyft are the only options until the trains resume in the morning. While there have been decades of community requests for 24-hour service to support the "night owl" economy of San Francisco and Oakland, the system's single-track "Transbay Tube" design makes 24/7 operation physically impossible, as one track must be closed every night for repairs. If you have an early morning flight or a late-night arrival, always check the official BART app for the "Last Train" time, as missing it could result in an expensive $60+ taxi ride across the Bay.