For The Love Of Port

Does anyone know exactly where the cima corgo ends and the douro superior begins?

I've been searching on the internet and on maps but I can't find the exact border anywhere. TIA!

The Cima Corgo sub-region streches out from the river Corgo valley (west) until the Cachão da Valeira (east). Here, at the Cachão da Valeira, starts the Douro Superior until the spanish border to the west.

Hope to be of any help. All the best !!

Thanks Maria Teresa! Nice to see you here. :)