Mark Lee McMorris (born December 9, 1993) is a Canadian professional snowboarder who specializes in slopestyle and big air events.

While filming for Transworld Snowboarding's "Park Sessions" video in March 2011, Mark became the first person to land a Backside Triple Cork 1440.

McMorris competed at his first FIS Snowboard World Cup during the 2009–2010 season, placing eighth in the big air event in Quebec City.

[12] At the Winter X Games XV in Aspen, Colorado, he won a silver medal in the slopestyle competition finishing behind fellow Canadian Sebastien Toutant.

[13] He won gold at the 2011 World Snowboard Tour's Air & Style competition beating out Peetu Piiroinen, Werner Stock, and Nils Arvidsson in the final.

McMorris' hopes of a 3rd consecutive gold medal were dashed when he tripped on the rails, crashed, and fractured a rib during the 3rd and final run of the event.

[16] As McMorris arrived in Sochi, he said he felt remarkably good, stating, "The amount of progress I've made since I broke my rib on Saturday has been unexplainable.

He attempted to do a frontside triple cork 1440, but in his landing, his toe edge was caught, which caused him to flip and break his femur.

McMorris returned to snowboard competition and competed for Team Canada during the 2018 Winter Olympics, only eleven months after his accident.

He placed third in Men's Slopestyle behind fellow Canadian Max Parrot and the American gold medalist Red Gerard, earning his second consecutive Olympic bronze medal.

[28] In 2006, when Mark was only 12, he rode his wakeboard around Lake Wascana pulled behind a dragon boat for 3.5 km in attempt to set a Guinness World Record.