The Frost-Crag Marches form the brutal surface threshold to the Kharbal Holdfasts, a regional corridor of alpine fortresses, avalanche roads, and deep valleys where every caravan travels under watch. Kharbal-Thum anchors the main approach, while the Seven Stoneway and Crag's Tooth Pass control movement toward the western Wilds. The Marches offer steady trade and military protection, but abandoned forts, buried tunnels, and predatory forces make the frontier dangerous beyond the walls.