What is the longest mountain range in the United States?

The longest mountain range in the United States is the Rocky Mountains, also known as the Rockies. The range stretches for over 3,000 miles (4,800 kilometers), from New Mexico in the south to Canada in the north. The Rocky Mountains are known for their stunning landscapes, including towering peaks, alpine lakes, and vast forests. They are home to diverse wildlife, including elk, bighorn sheep, and mountain lions. The Rockies are a popular destination for outdoor activities such as hiking, skiing, and camping.