This is the bonus cache for completing the Adventure Lab, Filming Yellowstone in the Bitterroot. You will need to complete the Adventure Lab in order to obtain the needed numbers for the correct coordinates.
https://adventurelab.page.link/8qG6
The listed coordinates take you to an informational panel.
N 45°A.B W 113°C.DE
The container only has room for the log, so bring something to sign the log with.
NOTE: Make sure to sign the cache logbook, as online "Found It" logs without a corresponding entry in the logbook will be deleted!