”Cache is at the posted coordinates”
In order to qualify for this challenge, you must somewhat travel around the word.
.
The circumference of the Earth at the equator is 25,046.98 miles. The objective of this challenge is from your list of found caches, pick 80 caches where the distance from your home coordinates, (starting point is at your discretion) of each cache adds up to 25,046.98 miles. Thus 25,046.48 to 25,047.48. Your average distance for the 80 caches will be approximately 313 miles.
Good luck on your quest, and remember is all about the journey.