Amtrak route southwest chief is one of the most iconic long-distance train routes in the United States, connecting Chicago to Los Angeles through a breathtaking cross-section of the country. This route passes through Illinois, Iowa, Missouri, Kansas, Colorado, New Mexico, Arizona, and California, offering travelers a mix of historic towns, desert landscapes, and mountain scenery. Known for its comfort and panoramic views, the Southwest Chief is a favorite choice for travelers seeking a relaxed and scenic rail experience.