Here's a 50-100 word summary of Ski Mystic Deer Mountain: Ski Mystic Deer Mountain, located in the Black Hills of South Dakota, offers a unique skiing experience with two ski lifts, one on the West and one on the East. The mountain has a vertical drop of 699 feet and a summit elevation of 6,850 feet. The resort is a private, members-only ski community with a limited number of trails, but offers a range of terrain for all skill levels. The resort is open on weekends only, and its small size and limited hours make it a hidden gem for those seeking a more intimate skiing experience.