

Best for advanced divers, Up to 78m, shore entry, moderate current.
Grotte de la Passerelle is a challenging freshwater cave dive located in the French Alps. The site features depths reaching 78 metres, requiring advanced, deep, and cave diving certifications. Divers enter from the shore and must navigate moderate currents within the overhead environment. Visibility is variable and can decrease significantly inside the cave system. Given the depth and the nature of the environment, divers must manage decompression requirements, gas consumption, and the risk of nitrogen narcosis. The site demands strict buoyancy control and the use of redundant lighting systems. Due to the cave layout, teams should have a practised lost-line protocol and verify local conditions before entry.
45.34959, 5.76943
Check current conditions and visibility locally before committing, as the cave environment makes a quick turnaround difficult once you are inside. Ensure your team carries redundant lights and has a practised lost-line protocol before entering.
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Expected in this region. No sightings logged here yet.
Depth
Up to 78m
Visibility
0m+
Skill Level
Advanced
Entry
Shore
Current
Moderate
Typical Dive
60 min
No, this site is for advanced divers only. It requires specific deep and cave diving certifications due to the overhead environment and significant depth.
The site reaches depths of up to 78 metres.
Access to the cave is via a shore entry.
No, this is a technical cave diving site with significant depths and an overhead environment, making it unsuitable for snorkelling.
Water temperatures are cold, ranging between 6 and 7°C. Divers should expect moderate currents and variable visibility.
Diving at Grotte de la Passerelle in Saint-Laurent-du-Pont requires the following certifications: Advanced, Deep, Cave. Always dive within your training limits.