Enter the code words you find at stage 1 into the certitude. You will be provided with the location on the map (and a hint) where the final is hidden. If you are unfamiliar with topographical maps, the primer here might be helpful.
You can validate your puzzle solution with
certitude.
Map for study/reference:
Record the clue at this cache in order to find Arboria Obscura: Unrest in the Forest (Final)
For Best Series, Best Multi, and Most Outstanding Scenery/Location
Park is open dawn to dusk. No night caching.