At the Denver Zoo entrance, you have reached one of the oldest zoos in the American West, an institution whose history tracks the transformation of American ideas about wild animals from spectacle to conservation. The Denver Zoo was established in 1896 when the mayor of Denver was given a bear cub as a gift and donated it to City Park — a casual origin story reflecting the era's casual relationship with captive wildlife. Bear Mountain, built in 1918, was one of the first zoo exhibits in America to replace cage bars with naturalistic rockwork and moats, allowing visitors to see animals without obvious confinement.
Today the Denver Zoo is deeply invested in conservation programs for endangered species, including work with the black-footed ferret — one of North America's most endangered mammals, native to the high plains of eastern Colorado — and the Amur leopard, one of the world's rarest big cats. The zoo's proximity to City Park and the Museum of Nature and Science has made this corner of Denver a particularly rich destination, connecting visitors to the natural world of the Rocky Mountain West through three complementary institutions within easy walking distance.