Nonbinary athletes will be able to compete in next year's Boston Marathon without having to register in either the men's or the women's divisions, organizers for the United States' most popular running event said.

Registration for the April race opened on Monday. The Boston Athletic Association (BAA) said the application allows runners to select nonbinary with regard to gender, making the race the latest nationwide to open such an option.

Nonbinary athletes who have previously completed a marathon as a nonbinary participant will be eligible to submit an application selecting the new option, the BAA said on its website.