The Boneway is a major pass that runs through the Red Mountains, connecting Dorne and the Stormlands. The name is a colloquial name, with the Stone Way being its official name.
Its Dornish side is guarded from the castle Yronwood, the seat of House Yronwood, which holds the title Warden of the Stone Way. The path runs north past the River Wyl and ends at Summerhall in the Dornish Marches. Castle Wyl, the seat of House Wyl of the Boneway, is located along the pass.
During the conquest of Dorne, King Daeron I Targaryen used a goat track to evade the watchtowers of the Boneway. Upon the death of Daeron, his brother, Baelor the Blessed, is said to have begun his reign by walking the Boneway barefoot to make peace between the Iron Throne and Dorne.
In 300 AC, Tyrion Lannister requested Prince Doran Martell send his armies to the Boneway to keep the marcher lords in their castles as part of the political betrothal of Myrcella Baratheon and Trystane Martell. Prince Doran Martell promised to move his banners into the high passes once Myrcella arrives safely at Sunspear. Word eventually reached Stannis Baratheon that the Dornish have fortified the mountain passes, poised to sweep down onto the Marches while he besieged Storm's End.