The Gjurn River is a tributary of the Usk, Nidal's central waterway. It has its source in the southern Mindspin Mountains of Nirmathas near the city of Glimmerhold. From there it flows west out of the mountains and into the northern plains of Nidal known as the Atteran Ranches. It joins the Usk less than 50 miles north of Usk Lake.
- Lissa Guillet and Amber E. Scott. (2017). Lands of Conflict, p. Inside Front Cover. Paizo Inc. ISBN 978-1-60125-927-1
- Lissa Guillet and Amber E. Scott. (2017). Lands of Conflict, p. 26. Paizo Inc. ISBN 978-1-60125-927-1
- Rob Lazzaretti. (2011). Inner Sea Poster Map Folio, p. 1. Paizo Publishing, LLC.