Road access, year-round visits, and shoreline visibility.
Cold karst lake dive near Staroe Yakushkino with clear, sulfur-fed water.
Cold karst lake dive near Staroe Yakushkino with clear, sulfur-fed water.
Blue Lake near Staroe Yakushkino is a cold karst spring lake that draws divers for clear, sulfur-fed water and a quiet freshwater basin. It is best treated as a shore-access skill dive: the open lake is simple, but the blocked tunnel opening and deeper flooded system reward careful buoyancy and conservative planning. Expect very sparse life and a deliberate cold-water dive rather than a reef-style outing.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
21m - 38m
Depth Note
Current lake depth is about 21 m. Published reports on the blocked tunnel/cave vary: one 2024 feature says divers reached 34 m and the fully underwater cave was about 37.5 m, so I used the conservative high-30s ceiling.
Best Season
Year-round; winter diving is possible because the lake does not freeze, but cold-water exposure is always part of the plan.
Typical Conditions
Very clear, cold, sulfur-scented water with a calm surface and a simple shoreline profile.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Cold-water exposure is the main issue. The blocked tunnel opening is not a penetration target, and the site offers very little biological distraction.
Access Restrictions
The tunnel/cave opening is blocked, so cave penetration is not an open option.
Legal Notes
Regional nature monument; follow local access rules and any dive-club coordination.
Community notes to help plan your visit.
Scuba Diving
Shore dive with a simple basin profile. Stay outside the blocked tunnel opening and keep the plan conservative in cold water.
Freediving
Possible for experienced cold-water freedivers, but it is not a strong freedive target because the lake is cold and the main attraction sits below the surface.
Snorkeling
Short surface looks are possible on calm days, but the water is cold and the real value of the site is underwater.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Road access, year-round visits, and shoreline visibility.
Organized dive access, clear water, and sparse life.
Tunnel discovery and deeper cave reporting.
Location, protection status, temperature, and lake character.
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