Big changes during the Summer of 2005 give Hidden Valley a new high-speed quad chair lift, two new black diamond runs, a new intermediate run and a new beginner run. Plus a new magic carpet lift is in the beginners section as well. Hidden Valley supports an average 70-day long ski season. All trails are lighted for night skiing. every evening and midnight skiing on Fridays and Saturdays in late December. Sunday Late Night Sessions too during peak holiday periods.