Through that company it is part of the Allianz – Jungfrau Top of Europe marketing alliance, which also includes the separately owned Wengernalpbahn, Jungfraubahn, Bergbahn Lauterbrunnen–Mürren, Harderbahn, and Firstbahn.

[2] The first proposals for the Berner Oberland-Bahn, made in 1873, showed a line from Interlaken (at that time Aarmühle) to Zweilütschinen with later options to Lauterbrunnen and Grindelwald with starting point at Bönigen.

[citation needed] In 1897 the company obtained a concession to construct a 54.7 km line from Lauterbrunnen to Visp, with stations at Stechelberg, Steinberg, Oberborn, and Blatten.

[citation needed] On 18 August 1902 a disastrous fire destroyed the station buildings and goods shed at Grindelwald and these were later rebuilt, surviving to the present day.

[citation needed] On 7 August 2003 two trains collided head-on on a single track section between Zweilütschinen and Wilderswil, 1 person was killed and 64 injured.

[citation needed] From the introduction of the 1999 timetable, the newly constructed 2.5 km section of dual track between Gsteigwiler and Zweilütschinen allows trains to pass without one having to wait in a loop, off the main line.

[citation needed] Like all Swiss railways the BOB operates to a clock – face timetable offering connections from the main line at Interlaken and, at its upper terminals, to the Wengernalpbahn.

[citation needed] Throughout the year the BOB offers a service every hour in each direction on both its lines, the trains leaving Interlaken Ost coupled together and dividing at Zweilütschinen.

The collection of goods stock totals over 30 assorted wagons, most pre-First World War, many built by SIG and much rebuilt by the BOB over the years.