While looking for places to hide a geocache, I stumbled upon a hidden historical marker that talks about the history of Laguna Hills. Take a seat to do your calculations and the cache is a short walk away.
You can find the cache at: N 33° 36.ABC′ W 117° 42.DEF′
A = Add up all the digits in the number of acres that Don Juan Avila was granted
B = Last digit in the year the artwork was designed
C = The number of raccoons
D = The number of European explorer ships
E = The 1st and last digit added together of the year the photo was taken of Paseo de Valencia
F = The number of Colonial European explorer portraits on the left side of the marker. As a check, they all have approximate dates below them
Checksum for the last 3 digits of the north = 13
Checksum for the last 3 digits of the west = 13
You can validate your puzzle solution with
certitude.