It turns out I am actually planning to do this. To run a 100 km race, that is. Which is very fitting, because I haven't done a marathon in 2014 (so I need to run at least twice that much in races next year).
I just signed up for the Mozart100 race to be held on 20.6.2015 in Salzburg. What this means is that I need to make a training plan and deside on new shoes to get, and to run, run and run. I already hear the Wienerwald calling :)