A marathon is typically defined as a long-distance running event that spans over 26 miles. However, there are many alternative terms that can be used to represent the same concept. For example, you could call it an ultramarathon, a footrace, or an endurance event. Other synonyms include a long haul, a slog, or a grueling test of endurance. Ultimately, the term you choose will depend on the context and the intended audience. Whether you're a runner, a coach, or a journalist, it's important to know the wide range of synonyms available to describe this iconic sporting event.