Big Bay Boom


San Diego's biggest Fourth of July Fireworks show takes over the San Diego Bay with four barges at different points. There are great viewing areas all along the bay for this annual event! Parking is free at park-and-ride lots throughout the system.

MTS will be operating a Sunday schedule. However, to accommodate the many thousands of people heading to the Big Bay Boom fireworks, the Trolley will be adding additional service on all three lines!

Remember, it's a major holiday so the FRIENDS RIDE FREE promotion is in effect (ALL DAY). A friend may ride free with a fare-paying customer on all MTS routes on July 4, 2023 for the entire day. Youth also ride free with a Youth PRONTO card/account. Youth Opportunity Pass Program.

Prime viewing locations are near the following stations:

  • County Center / Little Italy
  • Santa Fe Depot
  • America Plaza
  • Seaport Village
  • Convention Center
  • Gaslamp Quarter

PRONTO is the easy way to pay for your transit fare! Download the PRONTO App to your phone, then load money onto your app ahead of the fireworks show. Alternatively, you can also pick-up and add money to a PRONTO card (one-time $2 fee) at any Trolley ticket machine (lines can get long the day of, so plan ahead!), or any participating retail network location

Transit Station Parking

Big Bay Boom Trolley Map
Green Line
UC San Diego Blue Line
Orange Line


Due to large crowds, MTS recommends passengers take the first Trolley that comes through the station (regardless of line) and transfer at Old Town Transit Center if necessary. The Green Line and Blue Line both serve the Old Town Transit Center.

Address and Directions

North Harbor Drive and Broadway
San Diego, CA 92101
United States

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