The dwarves of the Rygar canton were a hardworking group, mining ever deeper and pursuing ore into dangerous territory. This dungeon goes from a snowy mountaintop spire down through the great halls and works of a vanished clan, and into the depths of the earth. Rumors of a massive gold strike lured miners and speculators into the mountain, but as winter came, the old mines grew deadly, the passes became snowed in, and airships failed to arrive with supplies. New monsters, a sinister brotherhood, and secrets locked away for centuries all boil to the surface in this series of challenging and original encounters. Halls of the Mountain King is a Pathfinder-compatible adventure for 8th to 12th Level characters.