The marathon is a long-distance race and is divided into full marathon, half-marathon and quarter marathon. The marathon test is the endurance and perseverance of the contestants. Participating in a marathon requires physical and mental preparation in advance. The marathon requires skill, or it causes wear on the body joints. There are stipulated time limits, but the world record for a real marathon road race project was really established only in 2004.
The marathon does not have an absolute set time (that is, the closing time). There will be no certificate of achievement or medals if it exceeds the closing time. The closing time is different for each event. Generally, the closing time of the whole marathon project is from 6 hours to 7 hours. For example, the closing time of the Xiamen Marathon is 7 hours. There are individual events for 5 hours, and there are also hours like the Hawaiian Marathon. If you finish the race, even if it is 24 hours, it will be completed, there will be a certificate of achievement and a medal.
Reference: The average finish time for a mid-level amateur is usually 4 to 5 hours.
The 2006 Beijing Marathon closed for 5 hours.
In the 2007 Zhengzhou International Marathon, the entire marathon was closed for 5 hours.