1. The term "ultramarathon" refers to an endurance running event that exceeds the standard distance of a marathon, which is typically 26.2 miles or 42.195 kilometers.
2. In an ultramarathon, participants often run distances ranging from 50 kilometers up to 100 miles or more, challenging their physical and mental limits.
3. The Soochow ultramarathon stands out because its participants are required to run around a 400-meter track continuously for a full 24 hours, making it a unique test of stamina and perseverance.
