In order to apply to participate in the Boston Marathon on behalf of one of the Boston Marathon Official Charities, you must contact your charity of interest directly. All charities that are selected as members of the Boston Marathon Official Charity Program are currently featured on our website and include an icon that links to contact information for the charity’s marathon coordinator. The marathon coordinator for each charity will be able to provide you with information about their application and selection process, requirements and deadlines. Charities Boston Marathon Registration What is the deadline to apply to participate in the Boston Marathon for one of the official charities? Use the Title for an admin friendly name so content authors can refer back to this FAQ item