On 03/12/2012 01:54 PM, Kim Weins wrote:

There is the Caltrain. From Union Square it's a long-ish walk to the train
station or you can take a quick cab ride.

Also for those us that will be using Muni/BART while in the city, there are three Muni bus lines that go pretty directly between Union Square and the San Francisco Caltrain Station (web site says 20 minutes between those locations).

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