The mountain range that runs along the border between the USA and Canada is the Rocky Mountains. Spanning over 3,000 miles, the Rockies stretch from New Mexico in the U.S. to British Columbia in Canada. This range is characterized by stunning peaks, deep valleys, and diverse ecosystems. The western slope of the Rockies is home to numerous national parks, such as Yellowstone and Yosemite, attracting millions of visitors each year. The Rockies play a crucial role in the geography and climate of North America, influencing weather patterns and providing critical water sources for various regions.