Powder River

Powder River, stream of the northwestern United States. It rises in several headstreams in foothills of the Bighorn Mountains in Wyoming and flows northward for 486 miles (782 km) to join the Yellowstone River near Terry, Mont. Tributaries include the Little Powder River and Crazy Woman Creek.

Citation Information

Article Title: Powder River

Website Name: Encyclopaedia Britannica

Publisher: Encyclopaedia Britannica, Inc.

Date Published: 24 September 2015

URL: https://www.britannica.comhttps://www.britannica.com/place/Powder-River

Access Date: February 23, 2025