Search the Maryland Half Marathon Calendar! Search for your next Maryland half marathon at the Maryland Half Marathon Calendar USA website page https://www.halfmarathonsearch.com/half-marathons-maryland. The half marathon running event calendar currently has Maryland half marathons 2026 and Maryland half marathons 2027 as they roll in. We strive to have all Maryland half marathon dates posted one year in advance. For races that are late in posting their Maryland half marathon