The Mysterious Peaks of Baranthar

Publisher's blurb:

For the past decade the snowy peaks of the Baranthar Mountains have remained shrouded by endless snowstorms that white out the majestic summit. The journal of a dead explorer brings the PCs to the perilous terrain, in search of the foul spawn of the demon Grualroth. As the party climbs the treacherous landmass, they must either ally with the savages of the region or take part in a grand massacre that will go down in the ages as a battle of legend. Next they climb the dangerous Slopes of Madness, before crossing Vornskall's Pass and confronting the evil that lairs within The Mysterious Peaks of Baranthar.