Marathon a long distance foot rare has an official distance of ___________?

A. 22.2 miles
B. 28.3 miles
C. 30.4 miles
D. 26.2 miles

Marathons are set at 42.195 kilometers (26.2 miles) because the International Association of Athletic Federations (IAAF) officially adopted that in 1921. After nearly 25 years of marathons stretching varying lengths, the 26.2-mile distance from the 1908 London Olympics was chosen as the standard.