They also rent bicycles, kayaks, sailboats, h2o skis and ski boats, and more. Crystal Lake Adventure Sports (Beulah, Frankfort) - Kayaks, canoes, sailboats, windsurfers, mountain bikes, snowboards, out of doors gear and attire, and a lot more. Crystal Canoe Company (Frankfort) - Custom canoes, canoe outriggers, and kayaks. Summer Music in the Park (Beulah) Free, weekly concerts in Beulah Park through the summer season.