Me and Ingemar (my father) went to run Europe's highest half marathon (21km).
It was really tough.
I ended up on 285th place out of 759 persons. Ran on 2.29h. Ingo ended up on 692 place and it took 3.12h.
More information can be found on this web page: http://www.bettmeralp.ch/gletscherlauf/allgemein.html