Moonlight on the Mountain is Sold Out June 28, 2017 Moonlight on the Mountain, one of Cheyenne Mountain Zoo’s adult-only events, is tomorrow night! Attendance is restricted to adults 21 and over. Tickets include unlimited samples of beer, wine, spirits and soft drinks, as well as delicious eats from area restaurants. Plus, local musicians will set the mood throughout the Zoo and have guests dancing the night away until 10 p.m.!