She did not finish the race before the blasts, according to the Boston Athletic Association website, but someone at her home said she and her family are fine.
Lawton, 51, told The Daily Voice last week that she felt indebted to The New England Center for Children since it helped her autistic son, Jack, live an independent life.
She previously ran the marathon in 2010.
Click here to follow Daily Voice Ossining and receive free news updates.