Le 13 juillet 2015
Second canyon de ce petit séjour haut-savoyard, et là encore comme à Coiserette quelques jours plus tôt découverte d’un magnifique parcours à Artemare dans le haut-Bugey. Le canyon du Groin ne jouit pas de la notoriété des classiques de Riolan, Barbaira ou Maglia par exemple, mais comprend un encaissement absolument exceptionnel dans sa première partie, qui rappelle par exemple l’oscuros de Mascun en sierra de Guara mais dans une version beaucoup plus longue et étroite : on évolue durant quelques centaines de mètres, en rappel ou à la nage dans de longs biefs (avec un très court siphon obligatoire), entre de hautes parois de calcaire presque fermées, bref une ambiance presque spéléologique où la frontale peut aider à trouver les scellements de rappel… Le parcours s’ouvre par la suite sur une marche en rivière suivie d’un second encaissement moins marqué mais aussi plus ludique, où sauts et toboggans permettent d’oublier le voyage au centre de la terre inaugural…
dans la partie amont du premier encaissement, exceptionnel !
dans l'oscuros, trépied et pose lente de rigueur, ou flash !
dans le second encaissement, plus ludique
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