In Ustalav, the Shudderwood is infamous for its wolves and werewolves.
The Shudderwood in Ustalav is almost entirely within the county of Lozeri covering most of that county to the point that, for many, the Shudderwood and Lozeri are synonymous. There is a small part of the wood in eastern Vieland. Many rivers flow through the wood including: the Buestral River, the Calscroix River, the Mothburn, the Moutray River, and the Troll’s Tail. The Dippelmere Swamp lies in the Vieland portion of the wood.
Much of the south-western part of the Worldwound is under the canopy of the Shudderwood. Here the fey of the forest have fought against the demonic invasion: in the north they have failed becoming half-fiends or other Abyssal monstrosities; in the south they are failing.