The California Zephyr is widely considered one of the most beautiful train journeys in North America. Operated by Amtrak, this iconic rail adventure travels between Chicago and the San Francisco Bay Area, crossing the Rocky Mountains, Colorado River canyons, Sierra Nevada, and vast western landscapes. Passengers enjoy panoramic Sightseer Lounge cars, comfortable accommodations, onboard dining, and unforgettable scenery throughout the journey. It is a bucket-list rail experience for retirees and luxury travelers exploring the United States.