Where it bubbles all the time like a giant carbonated soda
S O D A, soda
I saw the little runt sitting there on a log
I asked him his name and in a raspy voice he said...
Park at the leasing offices, N37 47.928, W122 27.099
At the posted coordinates you will find a fountain...
A = Number of cascades + Number of rectangular stone benches.
Nearby you'll find a sign containing an address consisting of four words and the letter B
B = The value of the first word on the sign
C = The number of letters in the second word on the sign
D = The number of letters in the third word on the sign
E = The number of letters in the forth word on the sign
Near the sign are bike racks
F = The number of bike racks (each bike rack attached to the ground counts as one). TIMES 2
G = The number of Jedi Masters visible outdoors at the posted coordinates. (there are more visible inside if you wheedle a little...)
H = B-G
I = B+G
The physical cache is located outside of the GGNRA at N 37 4E.HIC W 122 2F.EAF. It is about a quarter mile away and pleasant and interesting walk from stage 1.
The fifteen digit checksum of the final coordinates is 67.
If you are looking for a place to eat nearby, I recommend Liverpool Lil's, just outside the Presidio at 2942 Lyon Street - Lyon and Lombard. Be sure to try the French Onion soup.