Earlier quoted context omitted.
As a new dad, who also moved to the Bay Area from Europe, I would be interested what parts of the Bay Area would provide such a walkable environment?
Walkscore.com could be helpful. There are many wonderful walkable neighborhoods in the bay.
As an example, I randomly picked a particular address on walkscore.com (https://walk.sc/37yZciv) which gets a walk score of 91 (walker's paradise), but that particular address is on a large 7-lane street with not a lot of walking infrastructure around. I'm guessing the score might mostly be driven by proximity to stores, which doesn't necessarily matter in this case. Better metrics may be such things as amount of car traffic, noise levels, size of sidewalks (in comparison with size of streets), amount of small streets and distance to larger roads, etc..
I wonder if a website exists that puts more emphasis on how nice it is to walk in a neighborhood vs. mere practicality?