It's a popular outdoor and recreational area for the locals of both Kópavogur area and the residents of Fossvogur neighborhood. The valley is 2,5 km and a large area was used for agriculture until 1975. There are lanes for bicycles and for runners.
This area is very popular with runners and bicycle lovers. Everyday hundreds of locals run the lanes and use it for their daily exercises. You, as a tourist, need to work out after all these nights of drinking and fancy dining, right?
It reaches from Nauthólsvík area toward the Elliðárdalur Valley.