male mountain climber traverses a tricky rock chimney on his way to a high alpine summit

active adventure alpine alps backpack bern chimney client climber climbing crampons crest extreme fruenden fruendenhorn guide guiding harness high his hut kandersteg landscape loetschebrgtunnel loetschental male man mountain mountaineering nature oeschinensee outdoors peak people ridge rock rocky rope saddle sport sports summit swiss switzerland three top traverses tricky trio valais way work