Barin Ruins (はっくつ バリンいせき lit. Excavation of Barin Archaeological Site in Japanese) is the fifth race course and the second race track in Barin during Adventure Mode in Crash Nitro Kart. It appears to be stone ruins that still have some function as boulders are thrown at racers if they are too far behind. It is used in the Nitro Cup and the Blue Gem Cup (along with Clockwork Wumpa and Electron Avenue).
Strangely, the track is already available when Barin is first loaded, meaning that players can complete this track and then do Meteor Gorge.