On June 20 this year you will still be travelling on three separate trains if travelling Montreux - Interlaken:
Montreux - Zweisimmen (Golden Pass pamoramic train)
Zweisimmen - Spiez (BLS railway regional train)
Spiez - Interlaken (BLS regional train or local bus)
It will help you in your planning to understand the ‘Golden Pass’ brand.
The original Golden Pass is just the MOB railway which runs between Montreux and Zweisimmen. The Golden Pass tag was applied in the ‘Belle Epoque’ tourist era in the early 20th Century, and there was even a narrow gauge Pullman train.
When the number of tourists coming to Switzerland from outside Europe expanded dramatically in the late 20th century, it was found that tourists wanted to travel on the route linking the three ‘top’ popular Swiss holiday regions, (Lake Luzern area, Interlaken/Jungfrau area and Lake Geneva area). A through service was devised but because there are technical differences in the railway engineering the ‘Golden Pass’ service is actually three separate trains on three separate railway company’s lines:
Luzern - Interlaken (Zentralbahn, [ZB] red and white narrow gauge trains)
Interlaken – Zweisimmen (BLS railway, blue/white/green standard gauge trains)
Zweisimmen – Montreux (MOB railway, blue and white narrow gauge trains)
When this got established, to accentuate the ‘seamless’ journey, carriages on each of the three railways were painted in the Golden Pass chocolate and black livery, so even though you had to change trains twice the appearance of the vehicles helped to make the journey seem like a single journey.
A few years ago Zentralbahn replaced its trains so the old ‘GoldenPass’ carriages were scrapped and replaced with a standard type of multiple unit trains. These new trains are dubbed ‘Luzern – Interlaken Express’
As such a journey Luzern – Interlaken can be done once per hour throughout the day on the aforementioned ‘Luzern – Interlaken Express’ completely independently of any so called 'Golden Pass' service
New from 11 December 2022:
The long proposed direct train service Montreux - Interlaken is about to come to fruition. Innovative technology has allowed MOB and BLS railways to come up with carriages with axles that will automatically switch between narrow (1000mm) and standard (1435mm) track gauges at Zweisimmen, eliminating the need to physically change trains from a small metre gauge train to a full size BLS standard gauge train