Yes, in 2026, the Swiss Travel Pass provides free, unlimited travel on the scheduled boat services of Lake Brienz. You do not need to purchase a separate ticket; you simply walk onto the pier and show your digital or physical Swiss Travel Pass to the staff when boarding. The pass covers the entire route from Interlaken Ost to Brienz, including stops at popular spots like Iseltwald (famous for its Crash Landing on You filming location) and the Giessbach Falls. The boats operate seasonally, with a full schedule in the summer and a reduced service in the winter, so checking the current timetable on the BLS Navigation website is recommended. While the pass covers second-class travel, you can pay a small "class upgrade" fee at the station or on the boat if you wish to enjoy the upper deck of the first-class section. This "free" benefit makes Lake Brienz one of the best value-for-money excursions in the Bernese Oberland, as it allows you to enjoy world-class alpine scenery from the water at no additional cost beyond your initial pass purchase.