Francois Lhuissier, 35, the unofficial marathon winner, finished the 26.2-mile course with a time of two hours 25 minutes and 14 seconds, spokeswoman Jenny Radloff said.
A native of France, Lhuissier is a noted running competitor and currently lives in New York City, where he is a visiting professor at Columbia University, Radloff said.
On the women's side, Bay Area resident Anna Bretan finished first while setting a new course record, Radloff said.
Bretan's unofficial race time was two hours 42 minutes and 25 seconds, Radloff said.
Bretan, 28, has competed in multiple marathons and half-marathons and was the women's winner of the 2012 Oakland Marathon, Radloff said.
In response to the Boston Marathon bombings, there was additional security officers and police. Bags were inspected near the start.
Road closures will remain in place through Sunday afternoon.