Interlaken From Lauterbrunnen: The 22-Minute Day Trip Guide

A Small Town Between Two Lakes

Interlaken proper sits at 568 m elevation, measured at the site of the former convent and castle. It covers just 4.27 square kilometres, making it one of the smallest and most densely populated municipalities in the canton of Bern. The December 2020 population count was 5,719.

The name comes from the Latin inter lacus, meaning between the lakes, and the geography does what the name promises. The town lies on the Bödeli, the flat strip of land between Lake Thun and Lake Brienz, with the Aare river running through it. This flat, lake-fringed setting is unusual in the Bernese Oberland, where most settlements climb a valley wall.

A Bigger Built-Up Area Than The Population Suggests

The 5,719 figure counts only the town itself. The wider Interlaken agglomeration, which includes Unterseen, Matten and Bönigen, holds about 23,300 inhabitants. If you arrive expecting a village of five thousand you will find something larger, because the built-up area runs continuously across municipal lines.

For a day tripper this matters in practical terms. Restaurants, shops and transport connections are plentiful for the region, and the walking distances between the two stations and the lake shores stay short precisely because the town is so compact.

From Aarmühle To Interlaken

The town's history starts with an Augustinian convent built around 1133 on the site now known as inter lacus Madon. Remarkably, the settlement carried a different name until very recently by Swiss standards. It was called Aarmühle, after the mills on the Aare, until 1891, when it was officially renamed Interlaken.

The convent origins and the mill name both speak to the town's original function as a working religious and agricultural settlement on the plain, long before tourism reshaped it into the base camp for the Jungfrau region that it is today.

The Bernese Oberland Bahn, always shortened to BOB, runs directly from Lauterbrunnen to Interlaken Ost. The journey takes 22 minutes with no change of train, and the same applies in reverse for the trip home. Trains run at regular intervals through the day, roughly every half hour, and the SBB app or the departure board at Lauterbrunnen station gives the current timetable and how often the next one leaves. There is no fixed published CHF fare for this route. It is charged as a distance-based national fare, so check the current price in the SBB app or simply buy from the ticket machine on the Lauterbrunnen platform. No reservation is needed, you just board. Most riders describe the short run as scenic in its own right, since the valley walls fall away and the train opens onto the wide, flat Bödeli plain between the two lakes before pulling into Interlaken Ost.

A detail worth knowing for onward travel: the BOB line splits at Zweilütschinen, a few stops above Interlaken. One branch climbs to Grindelwald, the other to Lauterbrunnen, and they rejoin for the run down to Interlaken Ost. This is why a journey from Lauterbrunnen to Grindelwald takes 39 minutes with one change at that junction, while the leg down to Interlaken needs no change at all. It also means that if you ride down to Interlaken for the day, you are sitting on the same rails that carry every Jungfrau region visitor between the two valleys.

Interlaken Ost is the station you want for almost everything. It is the gateway to the Jungfrau Region. From its platforms the Harderbahn funicular climbs to Harder Kulm, Interlaken's own local viewpoint, in ten minutes.

The BOB trains back toward Lauterbrunnen and Grindelwald leave from here, and the line splits again at Zweilütschinen for the ride up. The station is practical in every other respect too. It has 200 parking spaces, 101 large lockers and 36 small ones if you need to stash a bag, and the full address is Bahnhof Interlaken Ost, 3800 Interlaken.

Interlaken West, the other station, sits closer to Lake Thun and serves trains on the lake lines. For a day trip from Lauterbrunnen you will arrive at Ost and probably never need the West.

The Transport Hub Of The Jungfrau Region

Interlaken works mainly as a base for exploring the surrounding region rather than a summit destination in its own right. Its two stations, the lake boats, and the road connections make it the natural assembly point for coaches and group tours. Tour operators can reach both the Grindelwald branch and the Lauterbrunnen branch of the BOB within minutes of leaving the Interlaken shop front, and the Zweilütschinen split means one departure point serves both valleys.

Add hotel stock and a large visitor population in the agglomeration, and you have the reason so many tour listings carry the words from Interlaken in their titles.

Look At The Destinations, Not The Departure Board

Here is the point most visitors miss. Scan the tours that depart from Interlaken and nearly all of them travel straight back toward the valley you came from. The guided Jungfraujoch day descends through Lauterbrunnen.

The e-bike tour pedals into the 72 waterfalls valley itself. The Mürren and Schilthorn days ride the Lauterbrunnen cable cars. Even the cheapest coach day, at $97, splits its time between Grindelwald and Lauterbrunnen.

The actual sights of this region, the Trümmelbach Falls, the car-free villages, the Jungfraujoch railway, sit in the Lauterbrunnen valley or above it. Interlaken is where the tickets are sold, not where the scenery is.

What This Means If You Are Already Staying In Lauterbrunnen

If your bed is in Lauterbrunnen, you hold a small advantage. You are already at the destination that most Interlaken-based tours spend hours reaching. You can ride down to Interlaken for a half day of town pleasures, lakeside walks and the Höhematte view, then return in 22 minutes without any tour at all.

When a tour genuinely adds value, such as a guide on the Schilthorn cableway or transport bundled with a Trümmelbach entry, you can still book it, since every one of these tours starts a short train ride from your door.

Interlaken is the bigger town with the fuller service offer, and its elevation of 568 m tells you it is lake country, not alpine country. You get short walks, two lake shores, a wide meadow with a mountain view, and every tour counter in the region within a few minutes of each other. Lauterbrunnen sits at the head of a valley wall system at the foot of the waterfalls, and the cable cars to Mürren and the trains toward the Jungfrau start at its station. If you base in Lauterbrunnen you wake up inside the landscape. If you base in Interlaken you wake up next to the transport that leads to it.

The honest answer for a day trip question is simpler. Do both. The 22-minute direct train removes the choice entirely. Stay wherever suits your budget and your nights, and spend a half day in the other town. From Lauterbrunnen, Interlaken makes an easy afternoon of flat walking, lake air and the Höhematte view, then a quick ride home. The reverse, a valley day from an Interlaken bed, is exactly what the tours above sell, and you can do it yourself for the price of a train ticket.

The town itself is compact. The table below is a realistic split for a day trip from Lauterbrunnen.

Two cautions on timing. First, the Jungfrau, Mönch and Eiger views from the Höhematte are a clear-day pleasure, so check the sky before you commit a mountain-view afternoon. Second, the summits themselves are for mountaineers, not day trippers from the meadow.

Do not budget time for walking up a 4,000-metre peak. If you want height, the funicular to Harder Kulm is Interlaken's own local viewpoint and the shortest way to earn it.