bluefootdiving.com · Dive Operator
Regional dive operator page describing Bonnie Castle as an easy shore dive and noting visibility range.
Dive Spot Guide•
Bonnie Castle
Bonnie Castle: shore-access river training dive park
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.
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Research Estimate At Bonnie Castle
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 9m
AccessSimple entry
Aquatic LifeAverage variety
FacilitiesGood facilities
CurrentLight current
SurgeFlat calm
Where Is Bonnie Castle?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Bonnie Castle Planning Details
Depth range, seasonality, and planning context.
Reported Depth
9.1m - 19.8m
Depth Note
Platforms are at 30 ft, and the maximum depth is 65 ft when following the guide lines to the sunken car or boat.
Best Season
Late spring through fall. Winter is for cold-water or ice-trained teams.
Typical Conditions
Freshwater river conditions with a line-guided route, seasonal temperature swings, and visibility that improves in the warmer months.
Safety & Access At Bonnie Castle
Hazards, restrictions, and access requirements.
Key Hazards
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.
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.
Recent Logged Visits At Bonnie Castle
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Bonnie Castle
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility9m
Activity
No dive activity logged yet.
