What Bonnie Castle Resort & Marina Offers

Bonnie Castle Resort & Marina is a waterfront property on the St. Lawrence River in Alexandria Bay that combines lodging, dining, and boat access in one location. The resort sits directly on the river, giving anglers immediate access to launch or dock, and the on-site restaurant and bar mean you can stay put for a full day or weekend without leaving the property. If you're fishing the Thousand Islands or the main river channel, the marina slip availability and river-facing rooms make it a practical base rather than a scenic afterthought.

The property operates year-round, though seasonal availability and pricing shift with the river's conditions and tourism traffic. Summer is peak season—busy, warmer, and the river is fully navigable. Winter fishing is possible but requires ice-out conditions and brings fewer tourists, which can mean quieter mornings on the water and easier access to slips.

Key Takeaways

  • Bonnie Castle offers direct river access with marina slips, so you can keep your boat docked and ready rather than trailering in each day.
  • The on-site restaurant and bar let you eat and drink without leaving the property, which matters when you're fishing early and returning late.
  • Rooms are river-facing, so you wake to the water and can monitor conditions before heading out.
  • Summer is crowded and pricier; spring and fall offer calmer fishing and lower rates if your schedule allows.
  • Contact the marina directly to confirm slip availability and current rates, as both change with the season and demand.

Marina Slips and Boat Access

The marina at Bonnie Castle accommodates boats of varying sizes, though slip availability is limited and fills quickly during summer months. If you're planning to dock your boat for multiple days, call ahead—don't assume a slip will be waiting. The marina staff can tell you what sizes they can take, current rates, and whether they have open slips for your dates.

The location is ideal for fishing the main river channel and the Thousand Islands. You're launching into deep water with immediate access to current breaks, structure, and the migration routes that walleye, bass, and pike follow. If you trailer your boat, there is on-site parking, though space is tighter during peak season.

Lodging and River Views

Rooms at Bonnie Castle face the river, which means you can watch the water conditions, boat traffic, and light from your window. This matters more than it sounds—you can gauge wind, current, and whether other boats are moving before you commit to a trip. The rooms are standard resort-style accommodations, not luxury suites, so set expectations accordingly.

The property fills up fast in July and August, and rates climb accordingly. If you fish in June or September, you'll find fewer tourists, calmer water on some days, and better availability. Spring (May) and fall (October) are shoulder seasons when the river is still fishable but the crowds thin out and room rates drop.

Dining and Amenities On-Site

The resort has a restaurant and bar that serve breakfast, lunch, and dinner. This is a genuine convenience if you're fishing early—you can grab coffee and food before dawn without driving into town. The bar is also a place to swap information with other anglers and get local tips on what's biting and where.

Beyond the restaurant, the property has typical resort amenities: a pool (seasonal), a gift shop, and event spaces. None of these are fishing-specific, but they matter if you're bringing family or staying for a weekend rather than a single night.

Rates, Seasons, and When to Call

Pricing varies by season, room type, and how far ahead you book. Summer rates are highest; shoulder seasons (spring and fall) are moderate; winter is lowest but comes with the caveat that the river may freeze or have limited navigation. Marina slip rates are separate from room rates and depend on boat size and length of stay.

Contact Bonnie Castle directly to confirm current rates, availability, and any packages they may offer for multi-night stays. Their phone number and website are the fastest way to get accurate information, since rates and availability change frequently and vary by date.

Nearby Fishing and Town Access

Alexandria Bay itself is a small tourist town with shops, other restaurants, and a public marina if Bonnie Castle is full. The town is walkable from the resort, so you can explore without driving. The Thousand Islands region has multiple fishing opportunities—structure, islands, and current breaks—all within a short boat ride from the marina.

If you want to fish with a guide or rent a boat instead of bringing your own, Alexandria Bay has charter captains and rental services. Bonnie Castle staff can point you toward local operators and may have relationships with guides who know the river well.

Planning Your Trip

If you're considering Bonnie Castle, decide first whether you want to dock your boat there or trailer in daily. Docking saves time and lets you fish multiple days without moving the boat, but it costs more and requires advance booking. Trailers have more flexibility but mean driving to and from the launch each day.

Book lodging and marina slips separately and confirm both before you commit. The resort fills up in summer, so if you want specific dates or a particular room type, call early. If your schedule is flexible, fishing in May, September, or October gives you better availability and often better fishing conditions than the peak summer crush.

Frequently Asked Questions

Do I have to stay at the resort to use the marina?

No. The marina operates independently of the lodging, so you can rent a slip without booking a room. However, slip availability is limited, and rates may be higher for day-use or short-term docking than for guests staying overnight. Call the marina directly to ask about day-use options and pricing.

What size boats can the marina accommodate?

The marina takes boats of various sizes, but slip availability depends on what you have. Call ahead with your boat's length and beam to confirm they have a slip that fits. Larger boats may have limited options or higher rates.

Is there a launch ramp if I'm trailering my boat?

Bonnie Castle is a marina with slips, not a public launch ramp. If you're trailering, you'll use the public launch in Alexandria Bay or nearby. The resort staff can direct you to the nearest ramp and confirm parking availability if you want to leave your trailer on-site while you fish.

What's the best time of year to fish from Bonnie Castle?

Summer (July–August) is warmest and most crowded. Spring (May) and fall (September–October) offer calmer conditions, fewer tourists, and lower rates. Winter fishing is possible but depends on ice-out and navigation conditions. Ask the marina staff what species are active during your planned dates.

Can I book a slip without a room reservation?

Yes. Contact the marina directly to reserve a slip. They handle boat docking separately from the resort's room bookings, though calling the main resort number will connect you to the right department.