Search the New Jersey Half Marathon Calendar! Search for your next state of New Jersey half marathon at the New Jersey Half Marathon Calendar USA website page. The half marathon running event calendar currently has New Jersey half marathons 2026 and New Jersey half marathons 2027 as they roll in. We strive to have all New Jersey half marathon dates posted one year in advance. For races that are late in posting their New Jersey half marathon dates, we do our best to update tho