Houston Marathon 2025 Registration Process. Participants must be at least 12 years old on race day to register for the marathon and 7 years old on race day to register for the half marathon. This annual event has become a significant part of the running calendar, drawing.
Depending on how early you register and the type of event, registration fees can vary. Tier 1 pricing is available until 1/31, so donโt miss out!