You are looking for a small bison. Please make sure to screw the top of the bison back on tightly to prevent water getting in (it's not a very good bison - thanks!)
No need to go along, or cross, the road to find the cache.
There is another good series of Caches over the road in Thorndon Woods, created by FamilyAustin. The road is VERY busy at times, so take extreme care if you decide to cross.