North Gate North Gate Castle is the keep that separates the Northern Frontier from the rest of the kingdom. Some 50 miles of wall – butting against the sea on one side and the dragonspine on the other - and the large castle itself, keeps that border sealed. So far, none have dared assail the tall walls and large 3,000 man garrison - but nobody's letting their guards down. Especially not with stories of dragons taking up residence in the Dragon's Spine, as it was in years long past.