At the height of the roman empire, how far north did the empire stretch?

The Roman Empire, during its peak, went as far north as Britannia. It took the regions of Londinium and Eboracum and went passed them. It was around AD 117 when the Roman Empire reached its greatest extend. After Trajan's death, many provinces were abandoned.

norsemen from northern countries had made earlier journeys

honeslty bro its the same thing