Interlaken is the base for the heart of the trip — four nights, no hotel changes, day-trip out and back each day. Trains everywhere, no rental car needed.
6th · Arrival
Zurich Airport — overnight
Land at ZRH, clear immigration, walk five minutes to Ibis Budget Zurich Airport (already booked). Check in 3 PM, drop bags, optional 30-min train into the Old Town for a first-night dinner if you have energy — otherwise sleep early. Tomorrow is a transfer day.
Cost note: Train ZRH ↔ Zurich HB is CHF 7 each way (covered by Swiss Travel Pass once activated).
7th · Day 01
Zurich → Interlaken · Iseltwald · Brienz Rothorn
Breakfast at the Ibis, hop the IC train Zurich HB → Interlaken Ost (~2 hrs, panoramic). Drop bags at your Interlaken hotel by noon. Afternoon: take the Lake Brienz steamer east to Iseltwald — the village from the K-drama "Crash Landing on You", the lakeside pier is the photo spot. Continue to Brienz, then ride the historic Rothorn cogwheel railway for the panorama (one of the few coal-fired steam mountain railways still running). Back to Interlaken by 7 PM.
Costs: Zurich → Interlaken IC ~CHF 38 (free with STP). Brienz Rothorn return ~CHF 96 (50% off with STP).
8th · Day 02
Grindelwald — First lift, adventure park, Pfingstegg
Train Interlaken Ost → Grindelwald (~35 min). Take the Grindelwald First gondola up — sweeping Eiger North Face views, the Cliff Walk to the platform jutting over the abyss. The "First Adventures" cluster sits at the top: First Flyer (zipline, 84 km/h), Mountain Cart (gravity karts down the mountain road), Trottibike (scooter back to the village). One toboggan run at Pfingstegg in the afternoon. Back in Interlaken for dinner.
Costs: First gondola ~CHF 72 (50% with STP). Adventure activities CHF 19–32 each. Pfingstegg toboggan ~CHF 38.
9th · Day 03
Schilthorn · Mürren · Gimmelwald · Lauterbrunnen
The big day. Train to Lauterbrunnen, bus to Stechelberg, then the Schilthorn cable car in four stages up to Piz Gloria (2,970 m) — the rotating restaurant from the 1969 Bond film "On Her Majesty's Secret Service". On a clear day, 200 peaks visible. Coming down, get off at Mürren — car-free cliff-edge village, walk the path to Gimmelwald (45 min, downhill), then cable car back to the valley floor and walk through Lauterbrunnen beneath its 72 waterfalls. Train back to Interlaken.
Costs: Schilthorn round trip from Stechelberg ~CHF 108 (50% with STP). Lauterbrunnen rail covered by STP.
10th · Day 04
Oeschinensee + Blausee
A water-and-colour day. Train to Kandersteg (~1 hr), gondola up to Oeschinensee — a turquoise mountain lake hemmed in by Blüemlisalp's vertical walls. Walk the easy 90-minute loop trail; the toboggan run back down to the gondola is fun and uncrowded. Back on the train to Frutigen, taxi or bus to Blausee — a tiny, eerily blue spring-fed lake in a private nature park (entry CHF 10, includes a glass-bottom rowboat ride). Back to Interlaken by evening.
Costs: Kandersteg–Oeschinensee gondola ~CHF 30 (50% with STP). Blausee entry CHF 10.
11th · Day 05
Mt. Titlis — Engelberg day trip
A long but spectacular day. Train Interlaken → Lucerne → Engelberg (~2.5 hrs, the Brünig Pass leg is itself scenic). At Engelberg, take the world's first rotating cable car (Titlis Rotair) up to Mt. Titlis (3,238 m) — glacier walks, the Cliff Walk suspension bridge, the ice cave inside the glacier. Time it for clear weather only — fog kills the day. Back to Interlaken by 7 PM.
Costs: Titlis Rotair return from Engelberg ~CHF 96 (50% with STP). Train Interlaken–Engelberg covered by STP.
12th · Day 06
GoldenPass Express → Montreux · Vevey
Check out of Interlaken. The GoldenPass Express (Interlaken Ost → Montreux, ~3 hrs 15 min) is one of the most scenic train rides in Europe — panoramic windows, gauge-changing trains, climbs through the Bernese Oberland and drops to the Riviera. Reserve seats in advance, free with STP. Drop bags in Montreux. Afternoon: train one stop to Vevey — quieter than Montreux, the Charlie Chaplin statue on the lakefront, the giant fork in the lake, the Alimentarium food museum. Evening back in Montreux: the lakeside promenade, the Freddie Mercury statue, dinner.
Cost: GoldenPass Express seat reservation CHF 20 / pax (train fare itself is covered by STP).
13th · Day 07
Montreux → Zurich · Old Town · Lake Zurich
Train back to Zurich (~2 hrs 45 min, change at Bern). Drop bags. Afternoon on foot: Niederdorf (the Old Town's east bank), Grossmünster and Fraumünster churches (the Chagall stained glass at Fraumünster is worth a visit), Bahnhofstrasse for window-shopping. Evening: walk along the Limmat to where it opens into Lake Zurich, dinner at one of the lakeside restaurants. Last night.
Cost: Montreux → Zurich covered by STP.