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Coach Clinic Today. OISA Scorekeeper Clinic Volunteer Coach Clinics OISA 202425 Registration is Live OISA Fall General Meeting 2024 Hiefield Scholarship Application 2024 Shredwell Scholarship Application Links to Photo Catalogs on Google 2024 Halfpipe State Results Boys Girls What We Do Our Competitions Banked Slalom Boardercross Slopestyle Halfpipe Leagues Our teams compete in all of the above events twice a season. Those competitions are organized into 4 leagues. The 3 northern leagues Gorge League Metro League Three Rivers Leauge all compete at Mt Hood Meadows.