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The 'Gudbrandsdalslågen' (or The Lågen^[1]) river flows through Norway's Gudbrandsdal valley.
The Gudbrandsdalslågen begins in the lake Lesjaskogsvatnet (or ''Lesjavatn''), which lies in Lesja municipality in Oppland. The ''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 Ottadal 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 km path, the Gudbrandsdalslågen drops rapidly through the Rosten Gorge in Sel.
Between the municipalities of Ringebu and Øyer the river widens out and creates a large 'riverlake' with the name Losna (lake).
The Gudbrandsdalslågen terminates in Lake Mjøsa at Lillehammer. It is the largest river flowing into this lake, which discharges into the short Vorma River^[2]. The Vorma joins the Glomma River at Nes.
Norwegian rivers crest in the spring as the snow melts. The Gudbrandsdalslågen, draining higher elevations and being primarily glacier fed, typically crests later than the Glomma river, which drains the east valleys. In the rare year when both crest at the same time, their confluence at Nes is the site of great floods. The most famous Gudbrandsdalslågen & Glomma simultaneous crest resulted in the flood of July 20–23, 1789 with crests over 50 feet above mean level at Lake Øyer below Nes and extensive damage, including 68 casualties.

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References and notes

References and notes

★ ''East Norway and its Frontier'' by Frank Noel Stagg, George Allen and Unvin, Ltd., 1956.

★ ''Adventure Roads in Norway'' by Erling Welle-Strand, Nortrabooks, 1996. ISBN 82-90103-71-9

★ ''Scandinavia, An Introductory Geography'' by Brian Fullerton & Alan Williams, Praeger Publishers, 1972.
1. The word ''lågen'' means watercourse in the Norwegian language and appears as a suffix meaning river. Examples of this use include in ''Gudbrandsdalslågen'', ''Numedalslågen'', and ''Suldalslågen.'' Lågen is commonly used for each in their traditional district.
2. The names of Norwegian rivers are not everywhere consistent along the watercourse, instead reflecting historical usage