First solve the Sudoku. Complete the puzzle by filling in the boxes with numbers between 1 and 9, but don’t repeat any number in any column, row, or block. The boxes containing letters will be used as clues to find the cache. Since there are no zeros, only replace the letters A - H. Have fun with this Sudoku, many more can be found on the web!
The given coords are for the parking lot for the rail trail. It's not much of a walk from there.
Thanks to MadMin and Fredi for all the tech help!!
The final is at N 42° B0.CAG W 073° FH.ED0.