Bonnie Castle Resort & Marina

A Riverside Gem in the Heart of the Thousand Islands

Bonnie Castle Resort & Marina sits on the shores of the St. Lawrence River in Alexandria Bay, offering visitors the ultimate gateway to the Thousand Islands region. This historic property combines world-class accommodations, exceptional dining, and a full-service marina into one unforgettable destination. Whether you’re seeking a romantic couples retreat, a fun family vacation, or the perfect venue for a wedding or special event, Bonnie Castle delivers on all fronts.

Dining with a View

The resort features multiple dining options that showcase the beauty of the St. Lawrence River. The Manor House Restaurant offers fine dining in an elegant setting, while The Pointe Bar and Grill serves up casual fare right on the dock (seasonally). Most importantly, the Riverside Sports Bar serves dinner Friday and Saturday starting at 5pm, making it easy to enjoy a meal with river views. Guests can also relax with a cocktail on the expansive decks while gazing directly at the iconic Boldt Castle on Heart Island.

Accommodations and Amenities

Beyond dining, the resort provides comfortable rooms, including jacuzzi rooms for ultimate relaxation. The property features a pool area where guests can unwind between activities. In addition, live music entertainment keeps the atmosphere lively for those looking to dance the night away.

A Full-Service Marina

Because many visitors arrive by boat, Bonnie Castle’s full-service marina serves as a convenient mooring point. Therefore, boaters can enjoy all the resort’s amenities without worrying about where to dock.

A Century of History

Bonnie Castle’s story dates back to 1877 when Dr. Josiah Holland, founder of Scribner’s Monthly, built his grand estate and named it after his novel Arthur Bonnicastle. The property has passed through remarkable hands, including Pittsburgh millionaire Gilbert T. Rafferty, who famously converted it into an actual island by digging a canal in 1908. The current owners have honored this legacy while modernizing the resort for today’s travelers.

Your Gateway to the 1000 Islands

The Thousand Islands region offers year-round entertainment—from visiting historic Boldt Castle to enjoying relaxing river cruises, local craft breweries, and distilleries. As a result, Bonnie Castle’s prime location makes it an ideal headquarters for exploring everything the area offers. The resort’s team is ready to help plan your perfect getaway while you enjoy the natural beauty and rich history surrounding you.