Interlaken isn't a one-day city — it's a base from which you launch day trips to some of the finest scenery in the Swiss Alps. Here's a practical three-to-four day plan covering the highlights without exhausting you.
Day 1: Settle in and Harder Kulm. After checking in, take an orientation walk along Höheweg, the main boulevard linking Interlaken West and Ost stations, lined with historic hotels and facing the green Höhematte meadow where paragliders land. In the afternoon, ride the Harderbahn funicular up to Harder Kulm at 1,322 meters for a panoramic view over the entire town and both lakes at once. A round-trip ticket costs about CHF 44 per adult, with a 50% discount for Swiss Travel Pass holders. The funicular runs April to November, with the first ascent at 9:10 am; there's a summit restaurant for a sunset dinner.
Day 2: Jungfraujoch — the roof of Europe. This is the trip's centerpiece. The train departs Interlaken Ost via Grindelwald or Lauterbrunnen up to Jungfraujoch at 3,454 meters, Europe's highest railway station, nicknamed "Top of Europe." A round-trip ticket from Interlaken runs CHF 224 in the off-peak months to CHF 262 during peak summer (May 1–October 31), and a mandatory seat reservation (CHF 10) is required in peak season, with a 25% discount for Swiss Travel Pass holders. At the summit, visit the Ice Palace, the Sphinx Observatory above 3,570 meters, and walk out onto the Aletsch Glacier, the largest in the Alps. Start early to beat crowds and the afternoon clouds that often roll in, and dress for winter conditions even in summer.
Day 3: Lake Thun and Lake Brienz by boat. Give yourself a day on the water. Boats on Lake Thun run year-round from Interlaken West, passing historic Schadau Castle and Thun's old town; a single second-class ticket costs about CHF 54 without a discount card. Lake Brienz boats (seasonal, not running in winter) depart from Interlaken Ost, showcasing the lake's distinctive turquoise water caused by glacial sediment, with tickets from about CHF 39 one-way. Swiss Travel Pass holders ride both lakes free, making it a strong value if your trip spans several days.
Day 4 (optional): Trümmelbach Falls or an extra trail. With time to spare, add a short trip to the glacial Trümmelbach Falls inside the mountain near Lauterbrunnen, or a gentle walking trail around Lake Brienz.
Practical tip: book Jungfraujoch tickets and seat reservations weeks ahead in summer, as slots fill fast, and check the mountain weather forecast each morning — clouds can completely obscure the summit even when the valley below is clear.
