The BAA heralded its elite field, which will include 21 men with sub-2-hour-9-minute times and 17 women who have run under 2:23.

Both of the Boston Marathon's defending wheelchair champions will return in April to race the 26.2 miles from Hopkinton to Copley Square in the 129th edition of the historic event. This year's Boston Marathon will mark the 50th anniversary of Bob Hall’s pioneering 1975 finish,

Defending Boston Marathon champions Hellen Obiri and Sisay Lemma are among the many star names in the elite fields for the World Athletics Platinum Label road race on 21 April.

Kenyan Hellen Obiri will pursue a third straight Boston Marathon title in April, the Boston Athletic Association said on Wednesday, while Ethiopian Sisay Lemma will defend his title in a speedy men's field.