For a long time, Markus was one of the most underrated all- rounders in the business, killing it in contests and videos without getting the name recognition of some of his peers. That's all changed now, though. ... Facts. Whether its transition, park , back country or big mountain Markus Keller can ride it. The former World Halfpipe Champ, Arctic Challenge winner, and proud cover boy of 17 snow mags within one calendar year keeps on leaving the dream and chasing for the best snow condition.