Sports 2021 Boston Marathon won’t be held in April, moved to fall due to COVID-19 October 29, 2020Metrowest Daily News Staff Report, Metrowestdailynews.comComments Off on 2021 Boston Marathon won’t be held in April, moved to fall due to COVID-19 The 2021 Boston Marathon, traditionally held on the third Monday in April — Patriots' Day — will be postponed until at least the fall of 2021.