What is the typical length of a marathon in miles?

The typical length of a marathon is 26.2 miles, which is the standard distance recognized by marathon races worldwide. This distance was established in 1908 during the London Olympics to accommodate the British royal family’s viewing requirements. The race was initially set at 26 miles, but it was adjusted to end at the front of Windsor Castle, thus adding the additional 0.2 miles. This specific distance has been officially standardized by the International Association of Athletics Federations (IAAF) and is used for all sanctioned marathon events. Understanding this context highlights the significance of the 26.2-mile distance as not just a random figure but one with historical roots and international acceptance.