Sunday's South Side Irish Parade headed down Western from 103rd.
With temperatures near sixty, parade organizers expect about 150,000 people to turn out.
The zero-tolerance for alcohol policy remains in place, the case the last three years after problems with drunk spectators prompted organizers to cancel the parade before bringing it back as a "family friendly" celebration.
Violators face a $1,000 fine.
The Saturday parade included bagpipes, parade floats and -- of course -- politicians stumping before the runoff election.
Police reported no major problems.