This is a letterbox, please don't take the stamp
The posted and final coordinates of the letterbox are the same.
This cache is placed in the Oxbow area with permission of Oxbow Inc. One of the requirements for placement is that the cache not be placed such that finders would go through crop fields. I have placed the caches this way and as you *NOT* to try to take shortcuts through farm fields per their wishes.
Start your hunt for the cache at the posted parking/trailheads.
See geocache listing https://coord.info/GCAE2VP for trail heads and parking.
You are looking for a preform tube in a willow tree.