How about some detective work? Where exactly was this one taken?
It looks like sand all around, and do I see a white marker on the right? Are those mountains, far on the left? or just clouds? Time of day could be found from the shadows.
The road surface got some asphalt covering of gaps. It seems that your side of the road was more heavily used than the opposite one.
I just looked at a map and I believe it was highway Mt.43 {odd numbers go north and south} It is interstate 15 now. This picture was taken just south of Butte Mt.
This photo was taken before the interstates were built. I was hauling boat trailers then, had to be the mid sixties.
And yes those are mountains, and sort of sandy in spots, wind would blow it over the road, making hazardous at times.
Helena is just beyond the mountains.
Doesn't look like West Yellowstone. Farthest I've been into Montana is about a mile from the west entrance of Yellowstone. On my want-to-go-there list.