Boneway
From A Wiki of Ice and Fire
The Boneway is a major pass that runs through the Red Mountains, connecting Dorne and the Stormlands. The name may is a colloquial name, with the 'Stone Way' being its official name[1]
Its Dornish side is guarded from the castle Yronwood, by the seat of House Yronwood, which holds the title of Warden of Stone Way[2]