The posted coordinates will take you to
GCMG2J, "Los Altos Hills Pathways: Artemas Ginzton Pathway"
micro cache. If you haven't found that cache yet, you can do that
now - click on the above link to log your find.
To find this puzzle cache, you'll have to find the other
trailhead to the Artemas Ginzton Pathway. You can go ahead and
explore the trail to see where it ends, or do some research and
find it without doing the exercise. Either way, it's unlikely to be
trivial, hence the 3.5 stars difficulty.
The container is hidden in an evil style, so if you had spent
the time to hike to the location, go ahead and decrypt the hints
below. For those who knew where it was ahead of time, try to find
it without the hints. Please bring your own pen or pencil. Good
luck!