By completing #1, you found a great place to Reference a resource for this series of caches. That was the reason why it was given a D3.
This walk introduces you to an area that I use as an exercise circuit. It can take you over an hour if you spend time taking in the views.
Your starting location is at Map 250 B 12.6
From here you will make your way to Map 250 B 12.2, a piece of real estate GC689ZC where you should check out the maintenance that has been undertaken to provide the information you need for this cache. After that, you will make your way to the next WP where you will need to access Certitude.
You can validate your puzzle solution with
certitude.