[1][2] Horgmo won a gold medal in Snowboard Big Air at the 2008 Winter X Games XII in Aspen, Colorado, after first beating Travis Rice in the finals, and Kevin Pearce in the semifinal.

In the summer of 2010 he was the first to land a triple cork (three off axis flips and four full rotations before coming back in contact with the ground) off a 100 ft jump in Folgefonna, Norway.

[4][5] In the Winter X Games XV Horgmo landed an attempt of the triple cork in competition in the Big Air finals on 28 January 2011, winning a gold medal over Sebastien Toutant.

[6] At the Winter X Games Aspen in January 2013, Horgmo was the first person to land a switch backside triple cork 1440 in competition, earning him a perfect score of 50/50 for the second year in a row and the gold medal in Big Air.

In the Burton US Open, Horgmo was the only rider to land a triple cork on the slopestyle course, but lost to Shredbots teammate Mark McMorris by a narrow margin.