Celebrate National Zoo Lovers Day at the Cheyenne Mountain Zoo. At an elevation of 6,714 feet above sea level, it is the highest zoo in the country. The zoo covers 140 acres, 40 of which are in use and it has been voted one of The Best Zoos in the Nation! Enjoy the great outdoors with the animals and dine with a view from atop the hill. A plethora of unique an interesting animals await on this National Zoo Lovers Day.