Upsala-Lenna Jernväg, Heritage railway in Uppsala, Sweden.

Upsala-Lenna Jernväg is a 33 km narrow-gauge line with 891 mm track, running from Uppsala through Bärby, Marielund, Länna and Almunge to Faringe. Steam locomotives and carriages date from the late 1800s and early 1900s, while diesel locomotives and railcars are from the 1950s. The line crosses E4 on a bridge built in older railway style.

The Uppsala–Länna line opened in 1876, the first 891 mm railway in the region, built to link the Länna ironworks to the standard-gauge network. In 1908 it was absorbed by Stockholm–Roslagens Järnvägar. The museum society SRJmf began steam excursions in 1974 and took over the Uppsala–Faringe section after freight traffic ended in 1977.

The railway demonstrates how passengers once traveled through the countryside and how iron from local factories was moved, with preserved equipment showing regional transportation methods.

Trains leave from Uppsala Ö, the heritage platform at Uppsala travel centre, and run to Faringe with stops including Bärby, Marielund, Länna and Almunge. Regular heritage services run on Sundays from June to early September, expanding to four days a week in July; charters and work trains appear at other times. At Marielund trains meet and steam locomotives take on water.

Some locomotives date from the 1800s and retain their original design, while others were modified to fit the narrow gauge later on. This mix lets visitors observe different periods of railway engineering in one place.