You are looking for a small bison tube.
If you find some other container, 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.
I have upped the difficulty due to the recent DNF's. After doing caches by santclaus and hipointer (in NH) this seemed like an easy one.