When will ski resorts in Powder Alliance open for the ski season? The 2024/25 Ski season in Powder Alliance starts from 2023/11/11. See this list of projected opening dates for Powder Alliance mountains. Important Note: Not all dates listed here are official and final, as resort opening dates are projected and subject to change. Check back for updates on when the lifts are set to start spinning at Powder Alliance, and don't miss opening day at your favorite resort!