

Best for advanced divers, 10-45m, boat entry, mild current.
Castle Rock is a freshwater drop-off site featuring a massive rock formation that descends vertically into the depths of Smith Lake. The underwater topography is rugged, characterised by large boulders and crevices. Divers should be prepared for depths ranging from 10 to 45 metres, with an average depth of 25 metres. A thermocline is present between 30 and 40 feet, where temperatures drop from the mid-60s to the high 50s Fahrenheit. Access is by boat only. Due to the depth, cold water, potential for entanglement, and low visibility of 1 to 5 metres, this site is suitable for advanced divers. A cafe is available at the site for post-dive refreshments.
34.03420, -87.05750
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Located in Cullman, Alabama, just a few miles off I-65.
Expected in this region. No sightings logged here yet.
Depth
10-45m
Visibility
1-5m
Skill Level
Advanced
Entry
Boat
Boat required
Current
Mild
No, this site is intended for advanced divers due to the depth, cold water, and low visibility conditions.
The site ranges from 10 to 45 metres in depth, with an average depth of 25 metres.
Castle Rock requires boat access.
Yes, the site has a snorkel rating of 4 out of 5.
Divers should be aware of cold water, significant depth, potential for entanglement, and low visibility.
Diving at Castle Rock in Cullman requires the following certifications: Advanced. Always dive within your training limits.
Castle Rock in Cullman typically has mild currents that most divers can handle comfortably.
Visibility at Castle Rock in Cullman typically ranges from 1 metres to 5 metres. Conditions vary with weather, tides, and seasons.