Career
Together with Benedikt Böhm he holds the records in speed ski mountaineering at the Muztagata and the Gasherbrum World War II Haag died on 24 September 2014 together with the Italian mountaineer Andrea Zambaldi at the Shishapangma in an avalanche accident. He was 36. speed record in high altitude mountaineering with downhill skiing at the Muztagata together with Benedikt Böhm under the leadership of Matthias Robl, 23 August 2005.