America’s Wild and Scenic Rivers live up to their name – The Lochsa

Also one of the original 1968 Wild and Scenic Rivers, the Clearwater includes the Selway and Lochsa Rivers. With an average gradient drop of 31 feet/mile, Lochsa is the Nez Perce Indian word for "rough water."

Dividing the mountain-locked grandeur of north-central Idaho, the Lochsa roughly parallels Highway 12 and Lolo Trail, the historic route of the Lewis and Clark Expedition and part of the National Trail System, which is also celebrating its 50th anniversary this year.

USA TODAY

https://www.usatoday.com/story/travel/experience/america/national-parks/2018/04/05/americas-wild-and-scenic-rivers-50th-anniversary/487297002/

Best access for running the Lochsa is from Missoula, Montana