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