Ski Magazine reports three skiers filed the proposed class-action lawsuit in Colorado’s federal court Aug. 6. They claim Vail Resorts, Alterra Mountain Company, Boyne Resorts, PWODR and Boulder-based research firm RCC Associates coordinated pricing by sharing confidential business information. It is the second major antitrust lawsuit regarding pricing filed against Vail and Alterra this year. The first, filed in March, challenges how the companies have structured the multi-resort pass offerings. Walk-up tickets that once hovered around $100-150 have crept well beyond $250 at many resorts during peak periods.