The Hadeland area includes large stretches of woodland. Approximately 69% of Lunner is covered by forest. Nearly half of the wooded area in Lunner and Jevnaker is common land (almenning). The local forestry cooperative plays a key role in the economies of the two areas. Their woods are home to a variety of flora and fauna, and host a number of species of birds, deer, elk and other wildlife. Populations of trout, char, bass and other freshwater fish have dwindled in the inland lakes and streams, but restocking efforts are now made.