Yes, you can use your Eurail Pass on almost all local and regional trains in Germany in 2026. This includes the RB (Regionalbahn), RE (Regional-Express), and S-Bahn trains operated by Deutsche Bahn (DB). These trains do not require seat reservations, meaning you can simply hop on and show your pass to the conductor. A supportive peer "must-know": while the pass is great for local travel, it is not valid on U-Bahn (Subway) trains, trams, or city buses, as these are typically run by local municipal transit authorities rather than the national rail system. In 2026, the S-Bahn is often the best "hack" for Eurail users in cities like Munich or Berlin, as it allows you to travel across the city center using your pass. Just remember that if you use a "travel day" for a 10-minute S-Bahn ride, it counts as a full day on your pass—so it’s often cheaper to buy a local metro ticket and save your Eurail days for the high-speed ICE trains.