During the build up to the ironman I took part in the Val D'Isere Altispeed trail race. This involved 32km of running around Val D'Isere with 2500m of climbing and descending, although if im honest there was not a lot of running as the climbs and descents were steep and hard going.
Being my first alpine trail run I was happy finishing in 58th out of 235 in a time of 5hr 08min.
http://www.flickr.com/photos/paulwestwatson/