Hidden Valley Golf and Ski Club is tucked away in the quiet hills of Eureka. Hidden Valley is a golf club in the summer and transforms into a ski resort in the wintertime. Hidden Valley offers a private 18-hole course that was opened in 1975. It is a 70 par course, 6,139 yards at a 121 slope. There is a pro shop on location offering a large variety of golf and ski equipment to rent for the day or purchase.