How Long Is The London Marathon

So, you’re wondering: how long is the London Marathon, exactly? Maybe you’ve seen the crowds on TV, or a friend mentioned they were training, and it got you curious. Well, let’s just say it’s a proper distance, but not as scary as it sounds.

The official answer is 26.2 miles, or 42.195 kilometers. That’s the standard marathon length worldwide, so London plays by the same rules. But wait—does that mean every marathon is the same distance? Yes, and it’s a pretty fascinating story how we got that number.

Why 26.2 Miles? The Quirky History

You might think 26.2 sounds random—like someone made it up over a cup of tea. And honestly, that’s almost what happened. It all goes back to the 1908 London Olympics, when the race was extended so the royal family could watch the finish from Windsor Castle.

Before that, marathons were roughly 25 miles, based on the ancient Greek run from Marathon to Athens. But that extra 1.2 miles stuck, and by 1921, the International Association of Athletics Federations made it official. So every time you see a marathon sign, you’re looking at a piece of London history.

What Does 26.2 Miles Actually Feel Like?

Picture this: 26.2 miles is like walking from the center of London to the edge of the city, then back again. Or imagine running from Big Ben to the Tower of London, then around the entire M25 motorway—twice. It’s roughly the distance of 422 football pitches laid end to end.

For context, a typical London bus route covers about 12 miles in an hour of traffic. So you’d need to ride that bus two and a half times to match a marathon. And yes, you’d probably be sick of the bus by then.

But Here’s the Cool Part: The Course

The London Marathon isn’t just a random 26.2-mile loop—it’s a tour of the city’s soul. You start in Greenwich, near the Cutty Sark, and run past landmarks like Tower Bridge, the London Eye, and Buckingham Palace. By the time you cross the finish line on The Mall, you’ve practically visited every major photo spot in London.

The route is designed to be flat and fast, which is why so many world records happen here. But don’t let that fool you: the last five miles are brutal. Runners call it “the wall,” where your legs feel like concrete and your brain starts playing tricks.

How Long Does It Take to Run?

For elite runners, it’s about two hours. Yes, two hours to cover 26.2 miles—that’s the speed of a city bus. But for most of us, it’s more like four to five hours. Some people walk the whole thing in seven or eight hours, and they’re heroes too.

So, what’s your pace? If you walk at a leisurely 3 mph, you’d need nearly nine hours. That’s a full workday of stepping, sweating, and probably craving a sausage roll.

Fun Comparisons to Make You Go “Wow”

Consider this: 26.2 miles is longer than the English Channel at its narrowest point (21 miles). You could swim from England to France and back and still have mileage left. Or, if you laid out 26.2 miles of spaghetti, it would feed a small army for a week.

In terms of steps, it’s about 55,000 steps for an average person. That’s like walking up and down the Shard skyscraper 40 times. And in calories? You burn roughly 2,600—the equivalent of eating 20 bananas, or one very large pizza.

Why the London Marathon Distance Feels Different

Look, 26.2 miles is the same everywhere, but London’s crowd makes it feel shorter. They line the streets, cheer for strangers, and hand out jelly babies. It’s a party where everyone is running, and the finish line is just an excuse for champagne and a medal.

So next time someone asks “how long is the London Marathon?” you can say “26.2 miles, but with a side of royal history and a lot of high-fives.” And if they ask about training, just tell them it’s a long way, but so is a good Netflix series—and this one has a sweeter ending.

Now, is your curiosity satisfied? Or are you tempted to sign up? You know you want to check that distance for yourself.