Consequently, it is considered part of Oslomarkvassdragene, the river system flowing through these forests, and more specifically Sørkedalsvassdraget, the valley above Bogstadvannet.

These farms, several of which have since given names to neighborhoods in Aker (now Oslo) and Bærum, were:[6] From Bogstadvannet going south, there are several sites of historical significance.

The pig iron originated in Southern Norway, whence it was transported by ship and unloaded at the dock at Vækerø before being pulled by horse and cart to the mill.

The terrain and scenery is quite varied along the footpaths, ranging from significant hills to flat and undulating stretches.

From this source, the river at first meanders to about Grinidammen, and then carves an increasingly deep valley into the landscape, and at the stretch around and south of Jar, it forms a canyon with a few natural pools occurring along the way.

The findings showed that the area around the river contained a rich diversity of plant and animal species, including 27 that are on the national IUCN Red List.

The area serves as a wildlife thoroughfare for mammals from the forests to the coastal regions, including moose and deer, who also graze there.

Squirrels, red fox, badgers and other smaller rodents make their homes in the area.