The Interrail Pass is a train ticket that allows you to travel on almost all trains in Europe. With it, you get access to 35 railway and ferry companies in 33 countries.

Technically, there is no product officially called the "US Interrail," as the Interrail Pass is a brand exclusively reserved for European residents traveling within Europe. However, for United States citizens and residents looking for the equivalent experience, the product is called the Eurail Pass. While the names differ, the functionality is virtually identical: it is a single rail pass that allows for flexible travel across 33 participating European countries. For travel within the United States itself, the closest equivalent to a national rail pass is the Amtrak USA Rail Pass. This pass allows travelers to book 10 "segments" of travel (a segment is one leg of a journey on a single train) over a 30-day period for a fixed price. It is a popular option for backpackers and enthusiasts wanting to see the American landscape via long-distance routes like the California Zephyr or the Empire Builder. Unlike the European version, the Amtrak pass is limited to 10 segments regardless of distance, so strategic planning is required to maximize its value across the vast US rail network.