The cache is not at the posted coordinates, but you will have a nice view of Earth there!
This has nothing to do with the puzzle, but don't forget to visit the yellow "sun" rock along the Trail as you are hiking.
Assume N42 and W121
A leap hour dot shortest day of the year
(Difference in equatorial & polar diameters - 10) dot 352.8315 days

You can validate your puzzle solution with certitude.

