The primary reason for the biodiversity in the Rocky Mountains is the varied climates and elevations found throughout the region.

The Rockies extend across different latitudes and altitudes, resulting in a wide range of habitats, from alpine tundra to lush forests. This variation creates unique ecosystems that support diverse plant and animal species, each adapted to specific environmental conditions. The changing elevations also influence temperature, precipitation, and soil types, further contributing to the region's ecological diversity. As a result, the Rocky Mountains are home to a rich array of wildlife, including iconic species like bears, elk, and bighorn sheep, making it a vital area for conservation.