Most people know a marathon is a long race. But ask someone the exact distance and you get everything from “about 26 miles” to “something crazy like 40 kilometers.” The number matters more than it seems especially if you’re deciding whether to sign up, setting a finish time goal, or just trying to understand what runners are actually up against.
Whether you’re a first-timer trying to wrap your head around the distance or someone who wants to compare it to other races, this article covers everything you need to know: the official distance in miles, kilometers, and meters, realistic finish times at every level, walking estimates, step counts, and a clear comparison to the half marathon and other popular race lengths.
Quick Answer
A marathon is exactly 26.2 miles or 42.195 kilometers. That’s the standard distance used at every official marathon worldwide, including the Boston Marathon, London Marathon, and the Olympics. Most runners finish somewhere between 4 and 5 hours, though times vary widely based on experience and fitness.
The Official Marathon Distance
A marathon is 26.2 miles, which equals 42.195 kilometers or 42,195 meters.
That distance is fixed. Every official marathon in the world — from small local races to the six World Marathon Majors covers the same course length. There are no variations, no shortcuts, and no longer versions. When someone says they ran a marathon, they ran exactly 26.2 miles.
Why Is a Marathon 26.2 Miles?
The distance comes from the 1908 London Olympics, held at Windsor Castle. Organizers measured the course from the start at Windsor Castle to the finish line inside Olympic Stadium a distance that happened to work out to 26 miles and 385 yards. That measurement was later standardized in miles and converted into the metric equivalent of 42.195 kilometers.
Before 1908, marathon distances varied between roughly 24 and 26 miles depending on the host city. The 1908 London measurement became the permanent standard adopted by World Athletics (then the IAAF) in 1921, and it has never changed since.
The “point 2” in 26.2 miles represents 385 yards, which is a little more than a fifth of a mile. It feels like a small detail until you’re running mile 26 and still have 385 yards left.
Marathon Distance in Every Unit You Need
| Unit | Exact Value | Rounded Value |
|---|---|---|
| Miles | 26 miles 385 yards | 26.2 miles |
| Kilometers | 42.195 km | 42.2 km |
| Meters | 42,195 meters | 42,200 meters |
| Feet | 138,435 feet | 138,400 feet |
| Yards | 46,145 yards | 46,100 yards |
Different countries and training apps use different units. Here’s the marathon distance broken down across every measurement you’re likely to encounter:
- Miles: 26.2 miles (precisely 26 miles and 385 yards)
- Kilometers: 42.195 km
- Meters: 42,195 meters
- Feet: approximately 138,435 feet
- Yards: approximately 46,145 yards
For training purposes, most runners in the USA and UK work in miles. Runners in continental Europe and most of the rest of the world typically train in kilometers. GPS watches and apps usually display both, so the unit you track in mostly comes down to personal preference.
How Long Does It Take to Run a Marathon?
The time it takes to finish a marathon depends almost entirely on your pace, experience, and how well your training prepared you for race day. There’s no single “normal” finish time the range is genuinely wide.
Average Finish Times by Runner Type
| Runner Type | Estimated Pace (per mile) | Estimated Finish Time |
|---|---|---|
| Elite men | Under 5:00 min/mile | Under 2:10 |
| Elite women | Under 5:35 min/mile | Under 2:25 |
| Competitive amateur | 6:52–8:00 min/mile | 3:00–3:30 |
| Recreational (solid base) | 8:00–10:18 min/mile | 3:30–4:30 |
| Average recreational | 10:18–12:35 min/mile | 4:30–5:30 |
| First-time marathon runner | 11:27–14:53 min/mile | 5:00–6:30 |
| Run/walk finisher | 13:44–17:09 min/mile | 6:00–7:30 |
For most recreational runners in the USA and UK, marathon finish times cluster between 4 and 5 hours. That represents the largest share of field finishers at major races like Chicago, London, and New York.
Here’s a realistic breakdown by runner type:
- Elite runners (men): Under 2:10 — world-class athletes running sub-5:00 miles
- Elite runners (women): Under 2:25 — professional athletes with years of high-volume training
- Competitive amateur runners: 3:00–3:30
- Recreational runners (solid training base): 3:30–4:30
- Average recreational runners: 4:30–5:30
- Beginner runners completing their first marathon: 5:00–6:30
- Run/walk finishers: 6:00–7:30
The average finish time for recreational runners is roughly 4:30 to 4:45 for men and 4:45 to 5:10 for women, based on broad race finish data from major marathons. These are population averages, not targets — your finish time should reflect your training, not someone else’s.
What Affects Your Finish Time
Several factors have a measurable impact on how long your marathon takes:
Training mileage. Runners who consistently hit 40 or more miles per week in training tend to recover better mid-race and hold their pace deeper into the back half. Under-trained runners often slow dramatically after mile 20.
Course elevation. A hilly course adds time. A flat course with good conditions gives you the best shot at a faster finish. Boston’s course, for example, includes notorious downhills early and climbs late, which affects pacing strategy significantly.
Weather. Heat and humidity slow runners down. Ideal marathon conditions are cool and overcast roughly 45°F to 55°F (7°C to 13°C). Racing in 70°F+ temperatures can add 20 to 30 minutes or more to your finish time.
Fueling and hydration. Bonking — running out of glycogen around mile 18 to 22 is one of the most common reasons runners slow sharply in the final miles. Consistent fueling during the race helps prevent it.
Race day conditions. Crowded starts, pacing errors in the first half, and tight turns on city courses all add seconds that accumulate into minutes over 26.2 miles.
How Long Does It Take to Walk a Marathon?
Walking a marathon is a legitimate goal and a realistic one. Many participants in large marathons walk significant portions of the course or complete the entire distance on foot.
The average walking pace is around 3 to 4 miles per hour. At that pace, a marathon takes:
- At 3 mph: approximately 8 hours 44 minutes
- At 3.5 mph: approximately 7 hours 29 minutes
- At 4 mph: approximately 6 hours 33 minutes
Most mass-participation marathons have course cutoff times ranging from 6 to 8 hours, so walkers should check the specific cutoff for their event before registering. Some marathons particularly large city races are walker-friendly with generous cutoffs. Others have stricter time limits that may be challenging for those walking the full distance.
A run/walk strategy, alternating between running and walking intervals, typically produces finish times in the 5:30 to 7:00 range and is a popular approach for beginners and those returning from injury.
How Many Steps Is a Marathon?
The number of steps in a marathon varies by height and stride length. Taller runners with longer strides take fewer steps to cover the same distance.
As a general estimate:
- Average runner: approximately 40,000 to 45,000 steps
- Shorter runners or walkers: up to 50,000 steps or more
- Taller runners with longer strides: closer to 35,000 to 38,000 steps
The most commonly cited average is around 40,000 steps for a recreational runner at an average stride length. Walking the full marathon increases the step count because walking strides are shorter than running strides.
If you’re training with a fitness tracker or smartwatch, your personal step count per mile from training runs gives you the most accurate estimate for your own marathon.
Marathon vs Half Marathon vs Other Race Distances
A common source of confusion is how a marathon compares to other popular race distances. Here’s a clear breakdown:
- 5K: 3.1 miles — not a marathon. A beginner-friendly distance and a popular starting point for new runners.
- 10K: 6.2 miles — also not a marathon. Twice the distance of a 5K.
- Half marathon: 13.1 miles / 21.097 km — exactly half the full marathon distance.
- Marathon: 26.2 miles / 42.195 km — the full distance.
- Ultramarathon: Any race longer than 26.2 miles, commonly 50K, 50 miles, 100K, or 100 miles.
To answer two questions that come up often: No, a 5K is not a marathon. No, a 10K is not a marathon. Both are excellent races and well worth running, but they are entirely different events. The marathon is a specific distance 26.2 miles and calling anything shorter a marathon is inaccurate.
The half marathon has grown into one of the most popular race distances globally because it demands serious training without the extreme preparation required for a full marathon. Many runners use a half marathon as a stepping stone before committing to a full.
What to Expect on Race Day
Knowing the distance is one thing. Understanding what race day actually feels like over 26.2 miles is something else.
The first few miles are usually crowded and deceptively easy. Most runners start too fast, carried by adrenaline and the energy of the crowd. Keeping your early miles controlled is one of the most important things you can do for your final result.
Miles 6 to 18 are where the race settles into a rhythm. You find your pace, your breathing steadies, and the miles start to feel routine. This is the section where consistent fueling and hydration matter most.
Miles 18 to 22 are where many runners hit difficulty for the first time. The body’s glycogen stores deplete around this point, which is what runners call “hitting the wall.” Proper training and race-day nutrition reduce the severity, but the back half of a marathon almost always feels harder than the front.
The final miles 23 through 26.2 are a combination of physical effort and determination. The finish line of a marathon carries a distinct kind of satisfaction that shorter races rarely match. Most first-time finishers describe crossing the line as genuinely emotional, regardless of their finish time.
Has Anyone Run a Marathon in Under Two Hours?
Yes once, under controlled conditions.
Eliud Kipchoge of Kenya ran 42.195 kilometers in 1:59:40 on October 12, 2019, in Vienna, Austria. The run was organized specifically as an attempt to break the two-hour barrier, with rotating pacemakers, laser-guided pace lines, and a perfectly flat course designed for speed.
Because the attempt did not meet official World Athletics race standards particularly around the use of pacemakers it does not count as an official world record. The run is recognized as a historic athletic achievement, but it stands separately from the formal record books.
The official marathon world record, set under regulated race conditions, is held by Kelvin Kiptum of Kenya, who ran 2:00:35 at the 2023 Chicago Marathon. On the women’s side, Ruth Chepngetich of Kenya set the world record at 2:09:56 at the 2024 Chicago Marathon.
Breaking two hours in a standard race remains one of the defining open questions in distance running.
Final Verdict
A marathon is exactly 26.2 miles or 42.195 kilometers a distance that has been fixed since 1921 and hasn’t changed since. Whether you’re running it in 3 hours or walking it in 8, the distance itself is the same for everyone on the course.
For most recreational runners, expect a finish time somewhere between 4 and 5:30 hours depending on training and conditions. Walkers covering the full distance typically take 7 to 9 hours, so checking your event’s cutoff time is important. And if someone asks whether a 5K or 10K counts as a marathon it doesn’t. A marathon is one specific race, one specific distance, and earning that 26.2 sticker means you covered every last yard of it.
