The Red River Valley is a region in central North America where Peter Venkman was once stranded. The valley encompasses North Dakota, Minnesota, and Manitoba in Canada.
Koza'Rai banished Peter Venkman to the Old West era. He eventually made his way to Red River Valley, an area near North Dakota and Canada. There he captured The Rudely Mallard Gang and saved Josie Maye Landers, who was set to become the schoolmarm at Red Valley Junction. The townsfolk hailed Peter as a hero and told many tales of his exploits. However, the Mallard Gang's defeat angered the Demon Collective of New York and they sent an emissary and Black Train to deal with Peter. Peter faced the emissary at the town's Grand Palace Hotel & Saloon where he met Rachel Unglighter.