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.
The wood itself is said to be one of the wildest and untamed places in Avistan and is infamous for both the packs of wolves that roam the forest and the werewolves that are said to control them. You know that whilst there are dozens of packs within the wood, they are all derived from, or pay homage to, one of five powerful tribes; The Demon Wolves, the Silverhides, the Broken Ones, the Princes Wolves and the Primals. The werewolf mentioned that Mathus Mordrinacht was the leader of the Silverhides and called him a betrayer.