The forests of North Sealand are the setting for many exciting mountain biking routes. The lang "Kongeruten" is Denmark's longest single-track.
In North Sealand, there are many forests, and you can freely roam in them on the forest tracks. You can bicycle, hike or horseback ride in them - there is space for everyone. Therefore the Danish cyclists' union have created ten tips for good biking karma in the forest; you can see the tips here.
The Nature Agency and Friluftsrådet have also written about the forests on their web pages.