EV FO SW HE WW EI TV DS OG GN DH
NS HW WE FG NU RS NF RF SG ED UZ
UT IZ TF DW TH RW DN DT GN OU ID
HO UD FE IF OU NZ FX NR TG GD FH
IS FF VG OG UI ER DW OX SW WE GN
NS GZ OW OU GW ND OT SW FS VD RO
There is a shortage of five star difficulty caches with high terrain ratings in Minnesota. Standard three square sudoku and their variants are a dime a dozen. That doesn't mean they aren't difficult but with all the online sudoku solvers available, this needed to be more difficult so people would have to get out a pencil. That is why this is a four square sudoku. Just in case there is an online solver for a four square I didn't use the letters A through P as you can see. The gibberish below the puzzle is the added twist to push the difficulty over the edge. Since this is a five star difficulty cache there won't be any hints issued or given.
The fun doesn't end there. The terrain reminds me of something Pear Head wrote, "I knew I was at the right place when I saw the hill." The GPS was bouncing vigorously so even though the GPS averaged for over 15 minutes, the numbers are likely to be off. The other side of that coin is that your GPS could take some time to settle down. This is fair warning (insert maniacal laughter here).
This is a letter box so please remember to bring your stamp. There is a stamp and ink pad in the container. However, the ink pad is small so you'll need to bring one large enough for your personal stamp to mark the log.