Gudbrandsdalslågen

Gudbrandsdalslågen
Basin features
Main source	Lesjaskogsvatnet 611 m (2,005 ft)
River mouth	Mjøsa 123 m (404 ft)
Physical characteristics
Length	204 km (127 mi)

The Gudbrandsdalslågen (or the Lågen) is a river which flows through the valley of Gudbrandsdal in Norway.

The Gudbrandsdalslågen begins in the lake Lesjaskogsvatnet (or Lesjavatn), 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. In the southeast at Lesjaverk village the lake serves as the headwaters for the Gudbrandsdalslågen, while in the northwest at Lesjaskog village, Lesjavatn is the headwaters for the Rauma river.

The Gudbrandsdalslågen flows through the Gudbrandsdal. Western tributaries of the Gudbrandsdalslågen include the Gausa River flowing through the Gausdal valley, the Otta River flowing through the Ottadalen valley, the Vinstra River flowing through the Vinstradal valley, and the Sjoa River, flowing through the Heidal valley. The eastern rivers, Jora, Ula, Frya, Tromsa and Mesna are shorter and drop precipitously from the heights of the Rondane. Although relatively placid for extended stretches of its 200-kilometre (120 mi) path, the Gudbrandsdalslågen drops rapidly through the Rosten Gorge in Sel.

Between the municipalities of Ringebu and Øyer the river widens out and creates the large so-called "riverlake," Losna).

The Gudbrandsdalslågen terminates in the lake of Mjøsa at Lillehammer. It is the largest river flowing into this lake, which discharges into the short Vorma River. The Vorma joins the Glomma River at Nes.

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