What trains are included in a Eurail Italy Pass?
All trains that are operated by Trenitalia, Italy's national railway company. Trenitalia runs 99% of all trains on the Italian mainland. You can simply hop on and off most trains whenever you like.
Keep in mind that high-speed trains and night trains need an advance reservation. You can book your seat or sleeping accommodation at an Italian train station or online through the Trenitalia website.