Back Bay Station to Castle Island
The bus route from Back Bay Station to Castle Island: where to board, where to change, where to get off and how late it runs.
Back Bay Station to Castle Island
- Bus 10
- Take bus 10From Dartmouth St opp Back Bay Sta, toward City Point via South Bay Center32 stops, about 36 min
- Get off at E Broadway @ Farragut RdThe stop after E Broadway @ P St
- Walk about 16 min to Castle Island
Weekdays, fall 2026 schedule · First and last trips
Quick answer: Take bus 10 to E Broadway @ Farragut Rd, and walk about 16 min. The trip takes about 52 minutes (41-60 min depending on the connection). On weekdays bus 10 runs about every 25 min during the day.
Get the live route from Back Bay to Castle Island
Step by step
- At Dartmouth St opp Back Bay Sta, take bus 10 toward City Point via South Bay Center.
- Ride about 36 min (32 stops). Get off at E Broadway @ Farragut Rd, the stop after E Broadway @ P St.
- Walk about 16 min to Castle Island.
Other ways to go
- Take the Orange Line toward Oak Grove to Downtown Crossing, then bus 7 to E Broadway @ Farragut Rd, and walk about 16 min: about 45 min.
- Take the Providence/Stoughton Line to South Station, then bus 7 to E Broadway @ Farragut Rd, and walk about 16 min: about 39 min.
Which one is faster depends on when you leave. Cobblehop compares them with live times and gives you the one that gets you there first.
Times and frequency
| Day | First trip | Last trip | How often (daytime) | Trip time |
|---|---|---|---|---|
| Monday-Friday | 5:21 am | 1:18 am | About every 25 min | About 52 min |
| Saturday | 5:26 am | 1:09 am | About every 35 min | About 52 min |
| Sunday | 6:30 am | 1:01 am | About once an hour | About 44 min |
First and last trip are when the first bus of the trip leaves Dartmouth St opp Back Bay Sta, on the fall 2026 schedule. "How often" is for bus 10.
Late at night
On weekdays, the last trip that works leaves Dartmouth St opp Back Bay Sta at 1:18 am and gets to Castle Island around 1:55 am. On Saturday nights the last trip leaves at 1:09 am, and on Sunday nights at 1:01 am. Late at night, ask Cobblehop for the last trip. It checks live times and tells you when to leave.
Tips for this trip
- Know your stop. Get to the door after E Broadway @ P St. The next stop is E Broadway @ Farragut Rd. Start a live trip in Cobblehop and it alerts you before your stop.
- Castle Island is at the end of Day Boulevard in South Boston. Fort Independence and Sullivan's are on the island.
- Back Bay station has the Orange Line, Commuter Rail and Amtrak under one roof. It connects to Copley Place by an indoor passage.
What it costs
- Bus. $1.70 one way, like any local bus.
- How to pay. Tap a contactless credit or debit card, phone or watch at the fare gate or bus door, or use a CharlieCard or CharlieTicket.
- Kids. Children 11 and under ride the MBTA free.
Fares as of October 2026. Check the MBTA's fares page before you ride.
Back Bay Station to Castle Island: common questions
How do I get from Back Bay Station to Castle Island by public transit?
Take bus 10 to E Broadway @ Farragut Rd, and walk about 16 min. The trip takes about 52 minutes (41-60 min depending on the connection).
How long does it take to get from Back Bay Station to Castle Island?
About 52 minutes on the main route, or 41-60 minutes depending on the connection.
Do I have to change buses?
No. Bus 10 goes all the way, so it's one ride.
How often does bus 10 run?
About every 25 min on weekdays during the day, about every 35 min on Saturdays and about once an hour on Sundays, on the fall 2026 schedule.
What time is the last bus from Back Bay Station to Castle Island?
On weekdays, the last trip that works leaves Dartmouth St opp Back Bay Sta at 1:18 am and gets to Castle Island around 1:55 am. On Saturday nights the last trip leaves at 1:09 am, and on Sunday nights at 1:01 am.
Related routes
- Back Bay Station to L Street Beach
- Back Bay Station to Leader Bank Pavilion
- Kendall Square to Castle Island
- South Station to Castle Island
- Never miss your stop (guide)
More routes from Back Bay Station
- Back Bay Station to Logan Airport
- Back Bay Station to JFK Presidential Library
- Back Bay Station to Seaport World Trade Center
- Back Bay Station to Boston Convention and Exhibition Center
- Back Bay Station to Carson Beach
- All routes from Back Bay Station
Official sources
Cobblehop is independent and isn't affiliated with these agencies or operators. Schedules on this page come from MBTA/MassDOT public data. Check their pages for the latest schedules and service changes:
Published October 30, 2026. Times were computed from the fall 2026 MBTA schedule (2026-11-04 for weekdays). Service changes, so check Cobblehop for live times before you go.
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