Yes, the Swiss Travel Pass fully covers the journey from Zurich to Interlaken. This includes both the direct InterCity (IC) trains that run via Bern and the more scenic "Luzern-Interlaken Express," which is part of the GoldenPass line. With the Swiss Travel Pass, you do not need to purchase a separate ticket; you simply board the train and show your pass (either digital or paper) to the conductor when they come around. Seat reservations are generally not required on this route, allowing for total flexibility. Furthermore, the pass covers your travel within Zurich on the S-Bahn and trams before you depart, as well as the local buses and even some mountain excursions (like the Schilthorn or Rigi) once you arrive in the Interlaken region, making it an incredibly cost-effective tool for this specific itinerary.