The coordinates take you to Lewis and Clark Park in Stevensville. The public bathroom has murals of each military branch.
In order to find the final, you will need to complete the Adventure Lab: Mural, Mural on the Wall. The Adventure Lab takes you to 5 locations in the Bitterroot Valley from Darby to Hamilton, Victor and Stevensville.
https://adventurelab.page.link/7C6j
The cache is a micro with only room for the log, so please bring something to sign the log. Please place back where found as this is a high muggle area.
NOTE: Make sure to sign the logbook, as online "Found It" logs without a corresponding entry in the logbook will be deleted.
Final:
N 46° AB.CDE W 114° FG.HIJ