To find this MYSTERY CACHE you will need to figure out its coordinates:
N42 26.ABC W071 39.DEF
The 6 geocaches each contain one of the letters with the corresponding number.
Once you have found all 6 geocaches you will be able to figure out the final coordinates to the MYSTERY CACHE.
May the 4th be with you!
Congratulations to REVENGE OF THE DEN LEADER for being FTF!