Yes, the Greek islands are included in the Eurail network, but primarily through a specialized product called the Eurail Greek Islands Pass. This pass is distinct from the standard Global Pass and is specifically designed for ferry travel between the mainland and the islands. It covers trips operated by the Attica Group (Blue Star Ferries and Hellenic Seaways). Depending on the version you purchase, it allows for 4 or 6 ferry trips within one month. The 6-day version even includes two international trips between Italy and Greece (via Superfast Ferries). If you have a standard Eurail Global Pass, you do not get free "hops" between islands, but you are often eligible for a 30% discount on most domestic ferry routes. In 2026, these passes are digital and must be activated via the Rail Planner app. It is important to note that while the "travel" is covered, seat reservations are mandatory and should be booked in advance during the peak summer season (June–August) to ensure you can board your desired ferry.