Dec 19, 2013 - 7:03 AM
I walked down the glacier from the Jungfraujoch to the KonkordiaHutte and then on to the Marjelesee with a mountain guide a couple of years ago in September
The guide commented how the glacier is changing daily - some steps he had cut two days previously had moved by the time we arrived. Ice cover was also unstable in places - I fell into a snow covered crevasse quite high up which was covered in snow!
The walk definitely needs technical equipment - rope, ice axe, crampons etc., and unless you have glacier experience I would suggest a mountain guide too.