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There were 10,612 finishers under muggy conditions at 40th edition.
Race founder Joan Benoit Samuelson ran the course with fellow running legends Frank Shorter and Bill Rodgers.
She won the first Olympic gold marathon medal in 1984.
Joan Benoit Samuelson had held the mark.
The invited athletes met with the press on Friday.
Joan Benoit Samuelson joins the Boston Marathon field.
Under the ruling, Deena Kastor would no longer own the American marathon record.
The 39th edition features $116,400 prize purse.
Olympic bronze medalist and American-record holder Deena Kastor will be there.