Just 15 minutes drive from downtown Oslo and you will be in the forrest.
The hills around Oslo have a very good coverage of updated orientering maps. The terrain is mainly covered with pine trees and birch. Good runnable tracks and small roads makes the running quite easy in most of the areas, but good orienteering skils are requiered in order to select the correct path.
The maps will be in 1:10 000 and made according to ISOM standard from IOF.