- Depth range
- 3–25 m10–82 ft
- Difficulty
- Intermediate
- Entry
- Shore entry
- Visibility
- 3–10 m10–33 ft
- Water temperature
- 6–26°C43–79°F
Dive-site story
What makes this site worth diving
Martha's Quarry in Wilson County, Tennessee, is a flooded limestone pit used for dive training and navigation practice. Steep rock walls descend 25 meters to a basin containing a school bus, cars, boats, training platforms, and a pump house. Spring and autumn yield the clearest water. Summer warms the surface but triggers algae blooms that cut visibility.
Submerged school bus, cars, and boats
Sheer limestone walls and platforms
Seasonal freshwater jellyfish
Location
Find the site
Use the map to plan with your operator and confirm the exact entry point on the day.
Plan this dive with care
- Sharp thermoclines drop water temperatures rapidly below 6 to 8 meters.
- Fine bottom silt reduces visibility quickly if disturbed by fins.
- Frigid water beneath the thermocline requires proper thermal protection year-round.
Seasonality
Best time to dive
- J—
- F—
- M—
- ABest
- MBest
- J—
- J—
- A—
- SBest
- OBest
- NBest
- D—
Spring and autumn provide peak visibility before summer algae blooms arrive.
Marine life
What you may encounter
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Largemouth BassMicropterus salmoides | Common | ||||||||||||
| BluegillLepomis macrochirus | Common | ||||||||||||
| Channel CatfishIctalurus punctatus | Common | ||||||||||||
| Freshwater JellyfishCraspedacusta sowerbii | Seasonal |
Marine forecast
Current and next 48 hours
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