SF Critical Mass
From SF Critical Mass:
By
Lisa Ratner
10:47 AM PDT on May 6, 2013
From SF Critical Mass:
Critical Mass is a mass bicycle ride that takes place on the last Friday of each month in cities around the world. Everyone is invited! No one is in charge! Bring your bike!
Next San Francisco Critical Mass: May 31st, 2013, 5:30pm, at Justin Herman Plaza (foot of Market Street).
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