Scenic journeys from Oslo coupled with circular walks (recommendations)

[_toommm_]

As the title suggests, I'm looking for scenic journeys from Oslo, perhaps with a circular walk. Happy to do a bit of hill-climbing, although I'm not too sure how far I'll be able to go with it being (presumably) snowy there. Apart from the Bergen line which I'm already aware of, does anyone have any recommendations please?

(I'm travelling there in a few days time if that makes a difference for summer-only suggestions).

 

[Sir Felix Pole]

The Holmenkollbanen is worth a ride up to the ski jump, with a spectacular view over the city and fjord. There are various walks around the summit, but the forecast looks to be rather snowy and cold!