You are looking for a small bison tube. If you find anything else keep looking.
Thought I'd put another cache here since it seemed like a good spot, and since all the leg work was already done I don't have to worry about my GPS and it's spotty reputation for coming up with questionable coords.
Congrats to crosspa, Beeg49 and ganz9876543210 for their FTF!
I have upped the difficulty as people are having a hard time with this one. It is still there.