The Green Monster is going big white. A 140-foot ski jump now towers over the legendary wall in Boston's Fenway Park. Big Air at Fenway will feature world-class skiers and snowboarders Thursday and Friday. It's an attempt to bring the sport down from the mountains and into cities where more people can enjoy it.

A worker paints a blue line on the ramp before the snowboarding competition of the Big Air at Fenway skiing and snowboarding U.S. Grand Prix tour on Thursday night. (Elise Amendola/AP)

Snowboarder Sepp Smits of Belgium, jumps in the Big Air at Fenway's snowboarding event. (Elise Amendola/AP)

Snowboarder Michael Schaerer, of Switzerland, above Fenway. (Elise Amendola/AP)

Snowboarder Max Parrot, of Canada, during the Big Air at Fenway snowboarding event at Fenway Park. (Elise Amendola/AP)

Snowboarder Michael Ciccarelli, of Canada, lands his third jump. (Elise Amendola/AP)

Snowboarder Michael Ciccarelli, of Canada, jumps in sight of the Prudential building. (Elise Amendola/AP)

Snowboarder Mons Roysland, of Norway, jumps with the moon behind above Fenway. (Elise Amendola/AP)