Don Murray wrote:
Ian,

California State Railroad Museum in Sacramento is not miniature, but it
is worth seeing. It's the real thing, one of the best railroad museums
in the country. It's about 100 miles east on I80 across the Bay Bridge.
About 2 hours one way from San Francisco.

Don

If the wife and kids aren't interested, drop them off at Sutter's Fort
while you go see it.