Since I took one of their containers, this cache is dedicated to all the members of the I.N.S.A.N.E. team, whose antic videos you can find on Youtube.
https://www.youtube.com/watch?v=_ZOkGujz_VI
After you get the cache, perhaps this cache should be dedicated to all those in this game that are slightly insane as well.
Start with a trail and endure some bushwhacking. You may also have to reach up to get the cache.