With danger close behind, the Broken Tusks journey through the bountiful but treacherous Lost Mammoth Valley in search of the Primordial Flame. The Tusks' scouts solve the riddles of the primordial valley and recruit a motley league of unlikely followers, all while evading the watchful gaze of the vale's villainous overlords. In order to fulfill their quest, the scouts must ultimately go toe to toe with these vile masters: a vicious white dragon, a sadistic necromancer, and a boarish beast-god. Lost Mammoth Valley is a Pathfinder adventure for four 4th-level characters.