The Wrenhaven River Patrol is a division of the City Watch that enforces the laws of the Empire across Lake Rifton and its tributaries. Headquartered in the town of Wrenhaven, The Patrol mainly checks and examines boats moving along the lake, ensures that travelers carry the proper documentation for such travel, and combats river pirates such as the Dead Eels.

Commander Kittredge leads the forces of the River Patrol.