How deep is Bonnie Castle?

The training platforms sit around 30 ft, and the guided route can take you to about 65 ft. That gives you a shallow option and a deeper practice route.

How do I dive Bonnie Castle?

Bonnie Castle is a shore-entry park. Enter from the resort property, follow the guide lines to the platforms, and decide whether to stay shallow or continue along the route.

Is Bonnie Castle better for scuba, freedive, or snorkel?

It is primarily a scuba site. Freediving and snorkeling are limited compared with the line-guided routes, platforms, and deeper features.

Is Bonnie Castle good for newly certified divers?

Yes. It is widely used for training and works well for newly certified divers who are comfortable with basic buoyancy and line awareness.

What current should I expect at Bonnie Castle?

Expect mild river current rather than a completely still entry. The line-guided layout helps, but you still want tidy spacing and route discipline.

What facilities does Bonnie Castle have for divers?

The resort setting gives you marina support, dockage, food and drink, restrooms, showers, and other day-use conveniences.

What visibility does Bonnie Castle usually have?

Expect roughly 8-9 m on an ordinary day, with better visibility possible in the warmer months and after good conditions.

When is the best time to dive Bonnie Castle?

Late spring through fall usually gives the best mix of water temperature and visibility. Winter is for cold-water or ice-trained teams.

Bonnie Castle

Bonnie Castle: shore-access river training dive park

Scuba DivingShoreBeginner9.1m - 19.8m

WallWreck

Bonnie Castle is a shore-entry resort site with line-guided routes, training platforms, and seasonal visibility swings.

About Bonnie Castle

Bonnie Castle is a shore-access freshwater dive park on the St. Lawrence River in Alexandria Bay, built around a wall, line-guided routes, and training platforms that make it easy to stage a river dive. It suits newer scuba divers, but the site still rewards steady buoyancy, route awareness, and timing your visit for the better visibility season.

Safety & Access

Site Conditions

Boat trafficEntanglement risk

Safety Notes

Follow the guide lines to navigate between the wall, platforms, and deeper attractions, and plan a safety stop near the shallow area with rocks.

Access Restrictions

Plan for resort-property access and a dive-park use fee; check in before entering.

Legal Notes

Use the designated shore-entry and line systems, and follow resort access rules plus local boating requirements.

Where Is Bonnie Castle?

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Community sourced coordinates.

Map imagery © Mapbox

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Local Intel For Bonnie Castle

Community notes to help plan your visit.

Scuba Diving

The park is built for scuba training, with suspended platforms, line navigation, and deeper route options that make it useful for new and experienced divers alike.

Freediving

Not the primary use case. The site is better suited to scuba than casual freediving.

Snorkeling

Snorkel use is limited to the shallowest edges; most of the useful route is set up for scuba.

Wildlife at Bonnie Castle

Species commonly reported at this site, with direct links into their wildlife guides.

Freshwater Fishes

Trout

Research Estimate At Bonnie Castle

Access · 4/5Simple entry

Research estimate

Aquatic Life · 3/5Average variety

Research estimate

Facilities · 4/5Good facilities

Research estimate

Current · 2/5Light current

Research estimate

Surge · 1/5Flat calm

Research estimate

VisibilityResearch estimate: 9m

Recent Visits

United States of America

Bonnie Castle

Bonnie Castle: shore-access river training dive park

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FAQ

Bonnie Castle, United States of America - Dive Spot Details & Conditions | DiveJourney

Bonnie Castle

About Bonnie Castle

Safety & Access

Where Is Bonnie Castle?

Featured Operators

Local Intel For Bonnie Castle

Wildlife at Bonnie Castle

Bass

Perch

Salmon

Sturgeon

Trout

Research Estimate At Bonnie Castle

Recent Visits

Bonnie Castle

FAQ

Bonnie Castle

About Bonnie Castle

Safety & Access

Where Is Bonnie Castle?

Featured Operators

Local Intel For Bonnie Castle

Wildlife at Bonnie Castle

Bass

Perch

Salmon

Sturgeon

Trout

Research Estimate At Bonnie Castle

Recent Visits

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