This was on our way out of Livingston. I found the post below that explains the significance of the two images.
From: Wayne C.Date: Fri, 15 Oct 1999 12:16:18 PDT
In Livingston, Montana, there is not only a large "P" (Park High School) on the side of the hill, but an outline of an enormous rainbow trout (Livingston is the fly fishing capitol of the world).
While the posts on this site are a bit old, it's still an interesting read about many different letters and such on the sides of mountains.
This was in someone's yard. It's along Highway 191 North between Big Timber and Harlowton.
I took this outside of Harlowton. My husband remarked that the wind must have been blowing pretty hard when they painted. He said the overspray will wear off. Cool shot while it lasts.