This bonus geocache is NOT at the posted coordinates!
First, you will need the Adventure Lab app available from the app store on your smartphone.
https://adventurelab.page.link/vz2h
You will then need to complete the
Amache National Historic Site Adventure Lab
in order to get the final coordinates to the physical container.
You will have 10 stops to complete before you receive the coordinates.
The final is at: N 38° 03.ABC′ W 102° 19.DEF′
The difficulty rating of this cache reflects the additional legwork required to unlock the final coordinates, actual hide difficulty is 1.5.