There are night tacks on trees leading you to the final cache. It is recommended that you wear long pants.
There should be 2 tacks on every tree except two trees have 3 tacks which signifies you are about half way done on your journey. At the 3 tack tree (arrow) go EAST. The final cache is a located with circle tacks.
Please remember to mark your car as a waypoint so you don't get lost getting back to the car at night.