Which Montana tributary was Emmet Sullivan born in?
Powder River (Wyoming and Montana) Powder River is a tributary of the Yellowstone River, approximately 375 mi long in northeastern Wyoming and southeastern Montana in the United States. It drains an area historically known as the Powder River Country on the high plains east of the Bighorn Mountains.
North Fork Musselshell River The North Fork Musselshell River is a tributary of the Musselshell River, approximately 35 miles (56 km) long, in Montana in the United States.