Castle Island

2010 William J. Day Boulevard, South Boston, MA 02127

Directions to 2010 William J. Day Boulevard

Location Features

Wheelchair accessible

Location Features

Public transit accessible

Location Features

Historic site

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The Details


Located on the South Boston shoreline, Castle Island is home to historic Fort Independence, a granite fort built for harbor defense in the 1800s. After taking a tour of the fort, you can enjoy scenic ocean views as you stroll down the 3-mile stretch of beach that makes up Pleasure Bay, the M Street Beach, and Carson Beach.


Castle Island


Fort Independence

Sunday: 1:30 pm-3:30 pm
Saturday: 1:30 pm-3:30 pm

Memorial Day to Columbus Day, Guided tours


Free parking is available at 2010 William J. Day Boulevard, South Boston.

Fort Independence from above

Historic tours

Learn about Fort Independence’s role in harbor defense and the history of Castle Island by taking a self-guided or guided tour.
People walking on a path on Castle Island

Scenic walks

Take a leisurely stroll through the 22-acre park, explore outdoor courtyards, or take a scenic walk around Pleasure Bay.

Additional activities

  • Fishing
  • Grilling
  • Swimming


  • Restrooms
  • Scenic overlook
  • Historic site
  • Boardwalk
  • Picnic tables
  • Showers
  • Grills
  • Group day use


Fort Independence

  • No pets unless they are certified service dogs.
  • Proper footwear is required.
  • Children under 16 must be accompanied by an adult.
  • The fort is only accessible on the lower level.
Image credits:  Shutterstock


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