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Map of Bonne Terre Mine
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IntermediateShore entry

Bonne Terre Mine

Missouri, United StatesDirections
Open Water suggested12–18 m (40–60 ft) depthShore entry

Bonne Terre Mine at a glance

Bonne Terre Mine is an intermediate shore dive site in Missouri, United States with depths of 12.2–18.3 m (40–60 ft). Typically most favorable Aug · from 3 years of archive data. Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:10

Wind forecast for this hour · 14:00 · run 14 h ago
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Tap a factor for its source and model point

Site hazards: Overhead mine environment, cold 58 F water, unlit side passages, depth on advanced trails

Read the full hazards ↓

Dive windows this week

Mon8:00–19:00 favorable

3 kn wind (3 kn wind)

Tue8:00–19:00 favorable

5 kn wind (5 kn wind)

Wed8:00–19:00 favorable

8 kn wind (8 kn wind)

Thu9:00–11:00 moderate, 11:00–19:00 favorable

7 kn wind (7 kn wind)

Fri8:00–19:00 favorable

3 kn wind (3 kn wind)

Sat8:00–19:00 favorable

5 kn wind (5 kn wind)

Sun8:00–17:00 favorable, 17:00–19:00 moderate

6 kn wind (6 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wind forecasts. Numbers under each bar are daylight averages.

First light 6:54 · Sunrise 7:21 · Sunset 18:10 · some windows run past sunset

Source: Open-Meteo wind · updated 26 Oct, 00:22 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Bonne Terre Mine

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Best time: Year-round; conditions are constant

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 90% of days have historically been favorable, wind has typically been 10 knots
  2. February, 91% of days have historically been favorable, wind has typically been 10 knots
  3. March, 73% of days have historically been favorable, wind has typically been 11 knots
  4. April, 67% of days have historically been favorable, wind has typically been 11 knots
  5. May, 92% of days have historically been favorable, wind has typically been 9 knots
  6. June, 96% of days have historically been favorable, wind has typically been 8 knots
  7. July, 96% of days have historically been favorable, wind has typically been 7 knots
  8. August, 99% of days have historically been favorable, wind has typically been 7 knots, historically most favorable
  9. September, 97% of days have historically been favorable, wind has typically been 7 knots
  10. October, 88% of days have historically been favorable, wind has typically been 9 knots
  11. November, 88% of days have historically been favorable, wind has typically been 10 knots
  12. December, 86% of days have historically been favorable, wind has typically been 10 knots

August has typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life recorded at this site

No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated June 2026

Site details

A flooded former lead mine in Bonne Terre, MO, holding a billion-gallon underground lake with around 100 ft visibility and a constant 58 F water temperature. Twenty-four numbered dive trails wind past pillars, ore carts, scaffolding and other mining artifacts; all dives are guided by staff dive guides with an assigned safety diver. New visitors must complete trails 1 and 2 before progressing, and advanced 'Bear Trail' dives venture into unlit sections for proven divers. Operated by West End Diving as a commercial dive resort.

cave

Overhead mine environment, cold 58 F water, unlit side passages, depth on advanced trails

Reviews

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