Maddie Mastro 2018 Winter Olympics profile | Snowboarding

Maddie Mastro competes in qualifying for the Ladies’ Snowboard Halfpipe final during the Toyota U.S. Grand Prix on January 11, 2018 in Snowmass, Colorado. (Photo by Matthew Stockman/Getty Images)Maddie Mastro of the United States stands on the medals podium after finishing second in the FIS World Cup 2018 Ladies Snowboard Halfpipe final during the Toyota U.S. Grand Prix on December 9, 2017 in Copper Mountain, Colorado. (Photo by Matthew Stockman/Getty Images)Maddie Mastro, of the United St