Croatia · about 27 km from Rijeka
Izvor Kupe
- Max depth154 m
- CertificationFull cave
- Water temperature≈ 5–7 °Cestimated, no reports yet
- SpecialExperienced divers
Diving and fills
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Fills nearby
- Fill stationDive Center Krk (Kornić)Air and nitrox (to 40 % €8, to 100 % €14 per fill, 2026); air in your own cylinder only with a valid inspectionRoute ↗
The dive
The spring lake measures ~200 × 50 m and lies at 321 m altitude, the lowest point of Risnjak NP. It discharges an average of ~1,200 l/s. The water is 5–7 °C and visibility in the spring 3–4 m.
Profile and sections
The spring lake measures ~200 × 50 m and lies at 321 m altitude, the lowest point of Risnjak NP. It discharges an average of ~1,200 l/s. The water is 5–7 °C and visibility in the spring 3–4 m.
The first official dive since independence was on 15 July 2007: six divers from KPA Kostrena, who turned at -10 m because of turbid water.
- Depth and profile
- Two feeder channels (older soundings: -57 and -86 m); explored to -154 m (Luigi Casati, Aug 2008; -115 and -135 m earlier in the same expedition); Garašić gives -155 m
- Configuration
- Passage profile not published; deep, cold and poor visibility — trimix/CCR expedition only.
- DPV: Not DPV-suitable (estimate)
- Vertical spring shafts; no point.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Configuration unknown — research beforehand
- Goes down to 154 m (trimix or deco may be needed)
- Experienced divers only
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Marked trail from Razloge (national park info point), ~30 min walk; a longer, less steep route from Kupari or Hrvatsko (~5 km). All kit has to be carried.
Around Izvor Kupe
Fills1 fill station · 50 km
Dive Center Krk (Kornić)
Dunat 50, 51517 Kornić, Krk
Air and nitrox (to 40 % €8, to 100 % €14 per fill, 2026); air in your own cylinder only with a valid inspection
Daily 9:00–19:00
PADI 5 Star Dive Resort by Dunat beach (Kornić) with three boats. Dives a string of caverns and tunnels in the Kvarner: Vrbnik Cave on Krk, Big Cave and Blue Hole off Cres, the Geierfels at Plavnik and the Prvić tunnel. Guide €12 per dive (2026). No trimix or cave courses mentioned.
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Caves nearby5 within 60 km
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