Charcoal

Historical marker location:

Leadore, Idaho

( Marker can be reached from Forest Road 533 near Forest Road 188, on the left when traveling west.)

and How It Was Made.

Idaho is home to the deepest river gorge in North America, the Hells Canyon, which is more than a mile deep. It's located on the border with Oregon and is a popular destination for whitewater rafting and other outdoor activities.