A. I get this question all the time, but the simple answer is always the same: 26.2 miles (42.195 KM). All marathons anywhere in the world are 26.2 miles. No exceptions. Just like a baseball has nine innings, or basketball has four quarters, a marathon by its definition consists of 26.2 miles of running. Now, if you see something called a half-marathon, it’s literally half (26.2 divided by 2 = 13.1 miles), and if you see a race called an ultra-marathon that would be a supersized version at 50, 75, or even 100 miles. (My former coach, Jim Saint-Amour, runs those, God bless him). But anyway, I only ever run full marathons (never as part of a relay team). When you see me run a marathon, it’s always going to be 26.2 miles.