
1) Event for Shaun White
Found on
https://www.crosswordclues.com/clue/halfpipe

U-shaped Ramp.
Found on
http://www.encyclo.co.uk/local/21300

A U-shaped channel with smooth walls used by freestyle skiers and snowboarders for aerial tricks. Typically a halfpipe is created by carving a channel out of massive piles of snow, but they can also be dug out of the ground in areas with minimal snowfall.
Found on
http://www.skis.com/Glossary-of-Ski-Terms/article-12-18-2012,default,pg.htm

A pipe-shaped snow construction which amateur and competitive skiers and snowboarders perform tricks out of as they descend down the hill.
Found on
https://gb.ski.com/ski-glossary

Another feature that appeals to freestyle skiers is the halfpipe. A U-shaped channel with smooth and manicured sides that freestyle skiers can launch themselves off and perform tricks.
Found on
https://www.inghams.co.uk/ski-holidays/ski-holiday-types/ski-holidays-for-b

An icy, sloped, U-shaped course. Skiers go back and forth between the walls of the pipe, performing a trick each time they go up the wall and above the pipe. The length can vary, but the standard height for a competition is 22 feet. Also called a superpipe.
Found on
https://www.nbcolympics.com/news/freestyle-skiing-101-glossary

An icy, sloped, U-shaped course. Riders go back and forth between the walls of the pipe, performing a trick each time they go up the wall and above the pipe. The length can vary, but the standard height for a competition is 22 feet. The large halfpipes used for major competitions are also called superpipes.
Found on
https://www.nbcolympics.com/news/snowboarding-101-glossary

A U-shaped snow structure built for freestyle snowboarding with opposing walls of the same height and pitch.
Found on
https://www.the-house.com/portal/snowboarding-terms/

Long, U-shaped channel used for freestyle jumps, spins, and tricks.
Found on
https://www.theskibum.com/snowboarding-glossary
No exact match found.