Powder River

  1. a river in NE Oregon, flowing N and SE to the Snake River. 110 miles (177 km) long.
  2. a river in NE Wyoming and SE Montana, flowing NE to the Yellowstone River. 375 miles (603 km) long.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018