2025 Half Marathon Calendar. Mark your calendars and lace up your running shoes because the 2025 milo marathon offers the perfect platform to showcase your endurance, determination, and heart. For each race, you’ll find the history of the half marathon and the course, the most recent year’s course maps,.

Calendar view listing counts of race events for each day of the month. The half marathon calendar is always a work in progress for all 2024 half marathons, for all events that have set their half marathon 2024 race dates and half.