As someone who grew up in San Jose, the map on the right is definitely wrong. In Bay Area geography, "The Peninsula" starts at the SF city limits, but ends with

As someone who grew up in San Jose, the map on the right is definitely wrong. In Bay Area geography, "The Peninsula" starts at the SF city limits, but ends with Mountain View and Los Altos (inclusive). Basically, the 650 area code. I also would not think of anything north of Menlo Park as "Silicon Valley". I must say, though, that I'm always a bit amused at the people who get bent out of shape at the mismatch between literal geographic terms in the Bay Area and the actual physical geography, as if it's only Californians that do that. San Francisco isn't part of The Peninsula in the same way that Brooklyn isn't part of Long Island. I would think that people would be more bothered by all the north/south freeways that intersect each other at right angles.