The Oslo Buddhistsenter invites you to join one of their English-speaking retreats:
When we go on retreat we hire one of several charming retreat centres. Two of them is in the beautiful archipelago on either side of the border to Sweden. Two of the retreat centres are in the midst of deep Norwegian woods, one being a dedicated Tibetan retreat centre. They are between 40-120 minutes drive from Oslo. They have a wonderful atmosphere of beautiful simplicity.