Historical clue formulations

• Sports event that notably declines to drug-test its participants — 2022-09-10
• Annual event with Ski Slopestyle and Skateboard Vert — 2022-02-12
• Competition with skateboarders — 2020-12-02
• Annual event that includes snocross and ski superpipe — 2018-07-13
• Annual ESPN broadcast since 1995 — 2018-04-28
• Event for snocrossers — 2016-09-18
• Event featuring motocross and snocross — 2015-03-03
• Snowboarders compete in them — 2012-05-18
• Event held each summer and winter — 2009-04-17
• Annual event that includes motocross — 2009-04-02
• Skateboarders compete in them — 2009-03-14
• Annual competition since 1995 — 2006-12-16
• Annual event that includes wakeboarding — 2004-11-06