Tretten is a parish and a small village in the northern part of the Øyer

Øyer

Øyer is a municipality in Oppland county, Norway. It is part of the traditional region of Gudbrandsdal. The administrative centre of the municipality is the village of Tingberg....

 municipality, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

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Its population is 880. Tretten is located on the Losna

Losna (lake)

Losna is a lake which lies in the municipalities of Ringebu and Øyer in Oppland county, Norway. Losna is a part of the Gudbrandsdalslågen, which is in this region so broad and runs so slowly that this stretch is recognized as a lake....

 lake, which is part of the Gudbrandsdalslågen

Gudbrandsdalslågen

The Gudbrandsdalslågen river flows through the Gudbrandsdal of Norway.The Gudbrandsdalslågen begins in the lake Lesjaskogsvatnet , which lies in Lesja municipality in Oppland. Lesjavatn is the only lake in Norway which has two outlets; they flow into two of Norway’s more famous rivers...

 river. The village had its own sports team Tretten IL until 1990, when a merger created Øyer-Tretten IF

Øyer-Tretten IF

Øyer-Tretten Idrettsforening is a multi-sports club from Øyer, Norway.It was founded on 29 November 1990 as a merger between Øyer IL and Tretten IL...

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Tretten was also the location of the biggest train disaster in Norway's history. The Tretten train disaster

Tretten train disaster

The Tretten train disaster occurred on 22 February 1975 when a northbound train from Oslo and a southbound express train from Trondheim collided head-on north of Tretten station. With 27 killed, including seven children under 16, and 25 injured, it was the worst train crash in Norwegian...

 occurred on 22 February 1975 when two passenger trains collided head on. 27 people were killed in the accident.

The name

The parish is named after the old farm Tretten (Norse Þrœttin for *Þróttvin - now called Prestgarden 'the vicarage'), since the first church was built there. The first element is þróttr m 'force, power', the last element is vin f 'meadow'. The farm is lying close to the river Moksa, and the first element is probably referring to the stream and the waterfalls in the river here.