The Crag is the seat of House Westerling in the westerlands. It is more of a ruin than a castle as the Westerlings no longer have the funds to maintain it. It sits along the coast of the Sunset Sea, south of Banefort, northwest of Ashemark, and northeast of Fair Isle.
A Clash of Kings
A Storm of Swords
The Crag was stormed, with Smalljon Umber and Black Walder Frey scaling the walls, while Robb broke through the main gate. Robb took a wound and was nursed back to health by Jeyne Westerling. During the nursing, Robb deflowered Jeyne, and being an honorable man, married her shortly thereafter. As a consequence of that, the Westerlings joined with House Stark.