Sansretour Marsh is a region of Toussaint in Blood and Wine, lying northeast of Beauclair and split in two by the Sansretour River. It is wetter and wilder than the vineyards to the west, with reed beds, river islands and old mills.

Places of note include The Cockatrice Inn, Count de la Croix’s Mill, the village of Flovive, the Tufo vineyard, the Owl Eye Grottos, the Valley of the Nine and Crane Isle, home of the Toussaint Prison. Several main quests, among them Capture the Castle and Burlap is the New Stripe, pass through the marsh.