The Troll Hills (Pathfinder)

From publisher blurb: Next to a little rock formation on the Great River generations of adventurers and the folk who serve them have established an outpost on the verge of the Troll Hills. Hidden in those rocky promontories are every breed of troll known to man and giants besides, remnants of the creation of the world with a mind to keep their secrets and their treasures to themselves. Screw up your courage and make a foray against the big folk!