Ski resort north of the city centre with five slopes, four lifts, ski/snowboard lessons, cross-country trails, a sledding hill, ski/snowboard rentals and two cafés. Oslo Ski Center has two hills, Grefsenkleiva and Trollvannskleiva.

Grefsenkleiva has the longer slopes for experienced skiers and snowboarders. The longest i 900 metres long. Here you also find a big jump, rails, and several small jumps. There are also two cafés where you can warm yourself up or buy something to eat or drink. Outdoor toilets.

Trollvannskleiva is very well suited for children and beginners. The slope slants easily downhill, and the "plate lift" is easy to use. There is also a ski/snowboard school, equipment rental, a sledding hill etc.