The Niesenbahn is a funicular railway above Lake Thun in the canton of Bern, Switzerland. It links a lower terminus, in the village of Mülenen at 693 m and adjacent to Mülenen station on the Lötschberg railway line, with an upper terminus at 2336 m near the summit of Niesen, a viewpoint above the lake and Bernese Oberland. The funicular is divided into two portions with a total length of 3.5 kilometers, an elevation difference of 1643 meters, and a maximum slope of 68%.

Construction of the line commenced in 1906, and it opened in 1910.

The service stairway for the Niesenbahn funicular is listed by Guinness Book of Records as the longest stairway, with 11,674 steps and a height of 1,669 m (5,476 ft). The stairs are usually employee-only, but there is a public run called "Niesenlauf" once a year.

The line is owned and operated by the Niesenbahn AG.

The line operates from late April to mid November, with cars operating every 30 minutes between 08:00 and 17:00. A 15-minute interval service is provided at busy periods, and evening services are operated on some days.

The line comprises two sections, with an interchange station at Schwandegg, and has the following parameters:

Feature	Lower section	Upper section
Number of cars	2	2
Number of stops	2	2
Configuration	Single track with passing loop	Single track with passing loop
Track length	2,112 m (6,929 ft)	1,388 m (4,554 ft)
Rise	975 m (3,199 ft)	667 m (2,188 ft)
Maximum gradient	66%	68%
Track gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge
Speed	2.9 m/s (9.5 ft/s)	2.0 m/s (6.6 ft/s)
Journey time	13 mins	12.5 mins
Capacity	60 passengers per car; 120 persons in each direction per hour	60 passengers per car; 120 persons in each direction per hour

• Doyon, Josy (1984), Ein Königreich am Fuss des Niesen (in German), Bern: Verlag Blaukreuz, ISBN 3-85580-169-X
• Petroni, Bruno (2010), Der Niesen und seine Bahn (in German), Interlaken: Verlag Schlaefli & Maurer, ISBN 978-3-85884-082-0
• Niesenbahn at Zeno.org. Article by: Viktor von Röll (ed.): Enzyklopädie des Eisenbahnwesens (Encyclopaedia of the Railway), 2nd edition, 1912–1923, Vol. 7, p. 360

• Media related to Niesenbahn at Wikimedia Commons
• Official website of the Niesenbahn
• Video of a round trip from the driver's point of view

46°38′22″N 7°41′25″E / 46.639356°N 7.69021°E / 46.639356; 7.69021