This was above the Snake River.
![Image](https://i.imgur.com/0B7RuE8.jpg)
Note the road down by the lake. That was a steep climb up the canyon on a minimum maintenance road. Once on the top of the canyon the road was well graded. That has been fairly consistent.
That is from the top of Lemhi Pass looking east. The trickle of water going down that mountain is the beginning of the Missouri River.