Boldt Castle Hours of Operation:
May 13, 2023, through October 9, 2023
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 1st and Sunday, July 2nd and remain open until 7:30 pm on Labor Day Weekend on Saturday, September 2nd and Sunday, September 3rd.
Visiting Boldt Castle & Heart Island:
Any of our daytime tours offer an optional stop at Boldt Castle at the end of the tour (with the exception of the 4:30, 2 hr tour, as Boldt Castle will close before it arrives most days). If you choose to disembark at the castle you can purchase the admission at the ticket booth on the island or at the official Boldt Castle website: www.boldtcastle.com
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.
Click here for more information about shuttle service too and from Boldt Castle
Click here for information about the history of Boldt Castle
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.