Took my pup for a walk and a cache grew every time she stopped.
I hope you enjoy the cache, but if you don't, don't tell me.
Where were you during the Roosevelt and Kennedy years?
The cache is not at the listed location, but a little history will help you find it.
N 38° 47.ABC' W 121° 20.DEF'
A Third digit in the year Aristotle Onassis died
B Last digit in the year before Joan Baez was born
C Last digit of the year Caroline Kennedy was born
D Last digit of the year JFK was murdered
E Second digit of the year FDR died
F The last digit of the year JFK was born
You can validate your puzzle solution with certitude.