Yes, the iconic yellow PostBus (PostAuto) network is fully included in the Swiss Travel Pass. In 2026, this remains one of the most high-fidelity benefits of the pass, as it grants you unlimited access to the extensive postal bus system that reaches the most remote Alpine villages, valleys, and mountain passes where trains cannot physically operate. The PostBus is more than just a transit system; it is a high-fidelity lifeline for rural Switzerland, and for tourists, it offers some of the most spectacular scenic routes in the country, such as the high-fidelity climb over the Furka or Grimsel Passes. You simply show your digital or paper Swiss Travel Pass to the driver upon boarding. This high-fidelity inclusion ensures that your travel is truly seamless across the entire nation, covering not just the major rail lines but also the intricate "High-Fidelity" network of local transport, making it a high-value necessity for those looking to hike or explore the traditional Swiss countryside beyond the high-speed urban hubs.