Yes, an Interrail (or Eurail) pass is a fantastic way to explore Switzerland in 2026, as it is valid on the entire SBB (Swiss Federal Railways) network and many private lines. However, it works a bit differently than a "Swiss Travel Pass." While your Interrail pass covers all standard intercity and regional trains for free, it only provides a 25% to 50% discount on most mountain excursions like the Jungfraujoch or the Gornergrat, whereas the Swiss Travel Pass often includes more of these local mountain segments. A major perk of Interrail in 2026 is that it covers the "transport" portion of famous panoramic trains like the Glacier Express and Bernina Express, though you must still pay a separate (and mandatory) seat reservation fee, which can be quite high in peak season. It also includes free travel on the scenic GoldenPass line and certain lake ferries (like those on Lake Thun or Lake Brienz). While the Interrail pass is great for those arriving from other European countries, it does not cover local city trams or buses in most Swiss cities, so you may still need to pay for local transit once you arrive at your destination station.