The United States is home to several major mountain ranges, including the Rocky Mountains, Appalachian Mountains, and the Sierra Nevada. The Rockies stretch from Canada to New Mexico, featuring rugged terrain and diverse ecosystems. The Appalachians, older and more eroded, run from Georgia to Maine, offering lush forests and rich wildlife. The Cascade Range in the Pacific Northwest is known for its volcanic peaks, including Mount St. Helens and Mount Rainier. These mountains provide recreational opportunities such as hiking, skiing, and climbing, attracting outdoor enthusiasts from around the country.