What is the length of the Great Wall from where it starts to where it ends?

The total length of the walls built in different dynasties is 13,170.69 miles (21,196.18 kilometers). The main purpose is to defend against the invasion of the minorities. Today, the most intact wall we see was almost built during the Ming Dynasty. It starts from Jiayuguan Pass in the west nad ends at Shanhaiguan Pass in the east.

Thanks Owen