Besseggen, or Besseggi, is a mountain ridge in Vågå kommune in Oppland county. Besseggen lies east in Jotunheimen, between the lakes Gjende and Bessvatnet. The walk over Besseggen is one of the most popular mountain hikes in Norway. About 30,000 people walk this trip each year.
The route over Besseggen starts at Gjendesheim, up to the trails highest point, Veslfjellet (1,743 m), down Besseggen, further over the relatively flat area Bandet, and ends at Memurubu, where one may take the regularly scheduled ferry route back to Gjendesheim. Many choose to do the hike in the other direction by starting at Memurubu after first taking the ferry there from Gjendesheim. The trip is estimated to take about 5–7 hours to walk without rest stops.
From Besseggen there is a great view over Gjende and Bessvatnet. One of the unique aspects of the view is that Gjende lies almost 400 m lower than Bessvatnet, and while Bessvatnet has a blue color typical of other lakes, Gjende has a distinct green color. The green color is the result from glacier runoff containing clay (rock flour). Looking down towards Memurubu one can see the nearby river Muru coloring the water with a light colored runoff.