2012 San Francisco California St. Patrick's Day Parade: Parade Saturday, March 17th at 11:30 AM The 161st Annual St. Patrick's Day Parade in San Francisco is a well-established event with historic ties to the city. The parade itself is a huge draw for attendees from all different demographics and ethnicity. The Parade begins at 11:30 a.m. on Saturday at the corner of Second and Market, where more than 5,000 participants from all over the states, will reel about with laughter and revelry all the way to City Hall. Join us for this great San Francisco event, which is the largest St. Patrick's day event west of the Mississippi.