As we went up and over the mountains today this was a picture I captured. It's Tongue River Canyon, a very wild and rough canyon which contains Tongue River. Tongue River is born in the Bighorns and goes on to become a tributary of the Yellowstone River. The Yellowstone eventually joins the Missouri River. This canyon was particularly beautiful today and the sun was just hitting it just right. Should you drive up the canyon you would eventually have to stop and hike on up the canyon and along the river. Then it becomes a steep, rocky path which rattlesnakes love to lurk around. It's very rocky but if you're tough enough and have enough time you could end up on top of the mountains from there.
We didn't go up the canyon - it was off to the north of the highway which we were on.