It's also 100 km to the border. The point is, we actually have trains (and busses) that can do this here. It's actually possible.

I visited Davis CA few times around a decade ago for comparison; Go to google maps, choose public transit, and use Davis as an origin or destination while dragging the other end around and see how many routes it can even find.

The rate of successes I get in the Sacramento conurbation are about the same as the rate of success I get for rural Brandenburg, but for most of the rest central Valley (with a handful of exceptions), Google mostly couldn't find a route at all.

By this measure, California's central valley is worse-connected for long-distance public transport even than rural Wales (measured by "can I route-find to Aberystwyth?").