Your Guide To Visiting Boldt Castle

A castle in the United States? On Heart Island, Boldt Castle is a mansion inspired by European castles.

If you're in Northern New York, hop on a ferry or boat tour and head out to Boldt Castle.

Boldt Castle sits on one of the 1000 islands in the St. Lawrence River near Alexandria Bay. It is maintained by the Thousand Islands Bridge Authority (TIBA), who acquired the property many years ago.

To appreciate this landmark you must know its history.

When It All Started

At the start of the 20th century, George C. Boldt wanted to bring the grandeur of the castles along Germany’s Rhine River to the United States. After finding a heart-shaped island, he hired an architectural firm to build a castle for his wife, Louise.

[caption id="attachment_17259" align="alignnone" width="1200"] Photo from Public Domain[/caption]

While the castle was under construction, the family lived in a summer home on a nearby island where they watched its progress. Boldt Castle was a testament of Boldt's love for his wife.

Construction halted after the untimely death of Louise Boldt. George telegraphed the workers and told them to abandon the plans. Brokenhearted, Boldt never returned to the island. For decades, the castle and the island were abandoned.

In 1977, TIBA bought the property for one dollar and renovated it. The organization took the island's story and made it a prominent attraction in Northern New York. The castle eventually comprised six floors filled with 12 rooms, tunnels, Alster's tower, and other features.

Now you can visit, take tours, and even get married on the castle grounds.

Tours

The island is accessible only by water. Because Boldt Castle is close to the Canadian border, tours from both sides of the border bring visitors to the monument.

Helicopter tours of the Thousand Islands including Boldt Castle are also offered. Once on the island, tours are self-guided unless you have booked with a tour group, in which case an agent will walk you through the castle and island's history.

[caption id="attachment_17262" align="alignnone" width="1200"] Photo from sarahtipton79 from Pixabay[/caption]

Yacht House

At the Yacht House, antiques and boats come together. It boasts an 1892 steam yacht and boats from Boldt Castle's original fleet.

[caption id="attachment_28995" align="alignnone" width="1200"] Photo from Boldt Castle website[/caption]

Packages

Sites like TripAdvisor and Viator have packages from multiple travel agents. One of the most popular on-island packages is the wedding package.

You can book the island and castle for weddings and other functions through Boldt Castle's official website.

How to Get There

The only way to the island is by boat. If you have your own boat, you may venture to the island that way.

If you're visiting from Canada, you'll need your passport.

Hours of Operation

[caption id="attachment_17269" align="alignnone" width="1200"] Photo by seabamirum from Flickr[/caption]

The castle and yacht house have parallel hours, except for special occasions and holidays. The official 2026 season runs May 9 to October 12, daily 10:30 a.m. to 6:30 p.m.

[Note: Due to high water levels the Yacht house is closed until further notice.]

Fees

The castle and the yacht house have separate fees. You can also purchase a combination ticket.

[caption id="attachment_17273" align="alignnone" width="1200"] Photo by Tomcio77 from Flickr[/caption]

Below is a breakdown of the fees:

Castle

Adult: $14

Kids (5-12): $10

Children 4 and under free.

Yacht House

Combination ticket (Castle plus Yacht House): Adult $17, Kids (5-12) $10

Children 4 and under free.

[The Yacht house is currently closed due to high water levels.]

Packages

Adult: $17

Kids (5-12): $10

Information

[caption id="attachment_17279" align="alignnone" width="1200"] Photo by Allan Watt from Flickr[/caption]

When traveling to Boldt Castle, here is some key information:

If you're visiting from Canada, the castle is an official point of entry into the U.S. This site's operating hours are 10:30 a.m. to 6:30 p.m. When the port of entry is not open, a video phone at the municipal dock in Alexandria Bay lets you check in.
Canadian currency is accepted.
Food is available at a cafe and hot dog stand.
You can pack a picnic and eat at the picnic tables on the castle grounds.

Getting Married?

If you would like to get married at Boldt Castle, this can be arranged.

Costs: $200 for the site; $14 per adult, $10 per child aged 5 - 12 years, free for kids 4 years old and under.

You can say your vows in the Dove-Cote next to the Italian Gardens in the courtyard. You can get married any day of the week. After the ceremony, you can take photos in the surrounding gardens.

Final Thoughts

This is a great getaway for a couple or someone into architecture. With its history and views, it would be remiss to not visit this piece of U.S. history.

Boldt Castle is also a great place to take children. The castle will inspire their imagination. It is a place the whole family can enjoy.

Looking for another nearby destination? Since the Canadian border is at arm's reach, check out Ontario, Canada!