The Thacher & Straitsmouth Islands boat launches will operate from June 3rd through August 27th in 2025, with trips to Thacher Island on Wednesday, Saturday and limited Tuesday mornings, and trips to Straitsmouth Island on alternate Tuesday mornings each month. Reservations are required for all passengers (including TSIA members using free tickets). Select which island and day of the week that you would like, and click on the link below to get to Eventbrite, where you can make your reservations.
All trips return two hours after their departure. Plan your adventure now!
Thacher Island Trips – click below
- Thacher Island Launch Reservations for Tuesdays
- Thacher Island Launch Reservations for Wednesdays
- Thacher Island Launch Reservations for Saturdays
Straitsmouth Island Trips – click below
Click on Visit Us for more information on ticket prices, departure location and parking.
Reservation support is available weekdays at (617) 599-2590 from 9am to 5pm.
