Now, let’s get things straight, there is no such thing as a highest possible number. No matter what number you have, there is always a larger one. For example, you can always add 1 to your number and get a larger number) The question really should be “what is the largest number that anyone has…
A half–marathon is 13.1 miles or 21 kilometers. That is exactly half the distance of a full marathon, which is 26.2 miles. It’s a good goal for runners who have already completed a 5k (3.1 miles) race or a 10k (6.2 miles) race and are looking for a bigger challenge.