Pay close attention to the finals of women’s snowboard Superpipe at X Games on Saturday evening. You’ll see the future of the sport in the likes of Chloe Kim and Arielle Gold. You’ll also see one of the most influential women the sport has ever known. She’s introduced new tricks. She’s won five X Games medals. She has an Olympic medal. And on Saturday evening, Gretchen Bleiler will drop into the X Games Superpipe for the final time.