This one might take some time to find as it will require you to travel over 14,000 miles around the country to 13 different places in 9 states. You will find a visual clue to the final location at each of your stops.
The waypoints for all places are listed below. You don't need to visit them in this order, it's up to you to arrange your trips in the most efficient fashion.
As for any long trip, we recommend you take with you the basic hiking gear: first aid kit, water, comfortable clothing and shoes, rain gear, matches, flashlight, whistle and sunscreen.
Bon voyage.