Lesjaskogsvatnet

Infobox_lake
lake_name = Lesjaskogsvatnet
image_lake =
caption_lake =
image_bathymetry =
caption_bathymetry =
location =
coords = coord|62|14|N|8|25|E|region:NO_type:waterbody|display=inline,title
type = natural lake, reservoir
inflow =
outflow = Gudbrandsdalslågen, Rauma
catchment =
basin_countries = Norway
length = 10 km
width =
area = 4.34  km²
depth =
max-depth =
volume =
residence_time =
shore =
elevation = 611 m
islands =
cities = Lesjaverk, Lesjaskog

Lesjaskogsvatnet (literally the Lesja woods lake) is a lake which serves as the headwaters for Gudbrandsdalslågen (literally the Gudbrands valley water course). Gudbrandsdalslågen flows through the Gudbrandsdal valley bottom, ending in lake Mjøsa.

The lake was dammed to serve the Lesja Iron Works in the 1660s and now has two outlets. It flows both East into the Gudbrandsdalslågen and west into the Rauma river in the magnificent Romsdalen valley.

No. 263 Squadron RAF operated with 18 Gloster Gladiator biplane fighters from a landing strip on the frozen Lesjaskogsvatnet in late April 1940 as part of the Norwegian campaign.