Boldt Castle Hours of Operation:
Open daily from Mother’s Day weekend through Columbus Day
10:30 am – 6:30 pm
SPECIAL HOLIDAY HOURS:
Boldt Castle will remain open until 7:30 pm on Independence Day Weekend on Saturday, July 6th and Sunday, July 7th and remain open until 7:30 pm on Labor Day Weekend on Saturday, August 31st and Sunday, September 1st.
Visiting Boldt Castle & Heart Island:
Any of our daytime tours offer an optional stop at Boldt Castle at the end of the tour. You can purchase admission tickets in advance on our website or Boldt Castles website. If you are unsure about visiting the castle when purchasing your boat tour tickets, you can choose to disembark at the castle and purchase the admission at the ticket booth on the island.
Boldt Castle is a separate operation from Uncle Sam Boat Tours. It is operated by the Thousand Islands Bridge Authority which charges an admission fee to Boldt Castle unconnected from our shuttle and our tour services.
Please note that the Uncle Sam Boat Tours shuttle will not bring new visitors to Heart Island 1.5 hours before Boldt Castle’s stated closing time.
Boldt Castle Rates:
These rates are in addition to all Uncle Sam Tour/Cruise Rates. Tickets for Boldt Castle can be purchased at the Uncle Sam Boat Tours Ticket Booth or at Heart Island for the same rate.
Adult – $12.50 (13+ years)
Child – $9.00 (5-12 years)
Infant – $0.00 (4 years and under)
Boldt Castle offers no discounts for military or seniors.
No Pets are allowed on Heart Island or the Boldt Yacht House with the exception of registered service animals.