Is it the course or the runner? That’s a fundamental tension whenever we ask what’s the world’s fastest marathon.

Boston, for example, is one of the harder courses out there – it’s net downhill but known for its fast first half followed by a notoriously difficult, up-and-down second half. There’s a reason they call it Heartbreak Hill.

Yet Boston’s rigorous qualification process and historic prestige make it one of the faster races based on average times. The famously tough BQ ensures that, whichever age bracket or gender you’re looking at, these are some of the best amateur runners around. So we see an average men’s time of 3:43:59 (based on available 2024 data) and an average women’s time of 4:05:17.

Compare those Boston times with the flatter, world-record-holding Chicago course, where the average times are considerably slower: 4:04:03 for men in 2024 and 4:35:03 for women. Another interesting statistic is that Boston has a high proportion of sub-three-hour finishers: 12.49% in 2025, the only one of the seven majors with a sub-three in double digits. That’s well more than twice Tokyo’s 4.5% and still higher than Berlin’s respectable 7.8%.

On this analysis we could either say that Boston is a fast marathon … or that the field matters more than the course.

Perhaps we should look at course records. The Boston Marathon is not eligible for world-record attempts, since its start and finish lines are too far apart and it has an elevation loss that slightly exceeds the World Athletics limit of 3.33 metres per kilometre. In theory that might mean that the best in the world aren’t attracted to race there. A full 15 years ago, in 2011, Kenyan Geoffrey Mutai set the course record of 2:03:02. If Boston was eligible for record keeping, this would place him 16th on the all-time list. Just last year, in 2025, Sharon Lokedi broke the 11-year-old women's course record with a new PB time of 2:17:22.

Back in Chicago, the late Kelvin Kiptum set the 2:00:35 world record in 2023. Ruth Chepngetich broke the female world record there in 2:09:56 in 2024 – her three-year ban in 2025 for anti-doping violations doesn’t strip her of the title. So you could argue that Chicago is the world’s fastest course, even though it has a lower percentage of sub-3:00 runners than Boston.

Since at the end of the day you can’t separate the runner from the route – 26.2 miles of tarmac is just a road until someone runs it – how should we think about what makes a fast marathon?

WHAT MAKES A COURSE FAST?

Obviously, we know there are key factors that make a route objectively better for someone looking to run fast. These include flatness, smooth surfaces and a minimum of tight cornering, low altitude where there is the maximum available oxygen, low temperatures and, finally, good weather, with little wind or rain typically expected.

Flatness. Lifting the body’s weight vertically – up a hill – requires extra effort and slows runners down. Conversely, a flat course is a fast course. Most of the races on our list are very flat. The exception is Boston, which has an elevation gain of 248m (815 feet) and loss of 388m (1275 feet).

Surfaces and cornering. Tight 90º corners or, worse, narrow 180º switchbacks inevitably slow runners down. Sections on the course where a large number of runners are suddenly funneled into a narrow stretch can slow the pack down. Cobblestones and gravel slow runners down. The fastest courses minimise or eliminate these barriers to fast times.

Altitude. At higher altitudes there is less oxygen in the air – that’s less of the primary fuel source for the aerobic metabolism required for high-performance running. You would need to be higher than 500m (1640 feet) above sea level to even begin to feel these effects. Nonetheless, every one of the world’s fastest marathons is effectively run at sea level.

Temperature. Writing for RUN, Greg Hosier cites eight different studies to conclude that ideal marathon temperatures are those between 6.7ºC (44ºF) and 15ºC (59ºF). Beyond this range, faster runners are less affected than slower runners – but everyone will run slower, experience increased perceived effort, and feel fatigue quicker. Women tend to perform better at the lower end of the optimal temperature range but are also less affected by high temperatures than men. Humidity and “wet bulb temperature” also affect endurance running results, but not to the same extent as the raw temperature.

Wind, specifically head winds, also slows runners down. This is why World Athletics’ record-eligible marathons must have start and finish points no more than 50% of the race distance apart, to ensure the course is more like a loop than a straight line, which could potentially be designed to maximise tail winds.

OUR LIST AND METHODOLOGY

Keeping all those things in mind, we’ve looked at a range of statistics (drawn from various authoritative sources) to compile a list of the five fastest medium-to-large* races in the world.

*\We wanted to look at bigger races – there are lots of “micro” marathons, many of them specifically built to target the BQ, but we were interested in medium-to-large marathons, which we defined as having a minimum of 5,000 finishers.

We’ve listed the 2026 date for each race, both as a handy calendar reminder and as a shorthand for season. These are all Northern Hemisphere races falling in the cooler months. We’ve also listed the events’ temperatures for comparison against that optimal 6.7ºC (44ºF) – 15ºC (59ºF) range. A flat course is a fast course, so we’ve listed elevation loss and gain; add these yourself to calculate the net differential.

Those are the objective course metrics. Then we come to the runners.

In making our list, we’ve looked at the course records and all-time top-50 and top-100 fastest times run there (comparing the two bands provides further nuance about what times have been achieved on a specific course and what kind of talent it’s attracting). These results help describe the spearhead of elites running the world’s fastest courses, which then shapes the overall cohort.

To understand that wider cohort, especially those striving for faster times, we’ve looked at total participation, and both the absolute number and the proportion of sub-three-hour results.

Round numbers have a nice ring to them and many serious runners benchmark 3:00 as a career goal. It’s difficult to achieve. Self proclaimed data nerd Brian Rock has done great work drawing on a massive US dataset (500,000 runners competing in races with more than 200 finishers during a period roughly reflecting the 2026 Boston Marathon qualifying window) to conclude that 4.8% of all runners achieve the sub-three mark. The percentage of sub-3:00 runners is at its highest among men in their early 30s, where just shy of 10% break three hours. “Of 300,000 men in the sample, 7.2% went sub-3:00. Of 200,000 women, that rate was 1.0%,” Rock writes. So, it’s much harder for women to reach that time. (Rock sees a similar 7% of women reaching 3:30, making 3:00 versus 3:30 a fair mental comparison between the sexes.) Keeping that in mind, for female readers the 3:00 benchmark we’re using is still a useful indicator of a fast course.

Generally, as a race gets larger it will attract a wider cross-section of runners, slow as well as fast. So it’s interesting when a large race pulls in a high absolute number of sub-3:00 runners as well as a high percentage. That’s the difference between the Seville and Valencia marathons on our list.

This is also a good excuse to mention one of Australia’s newest marathons. The website Sub-3 ranks the Ballarat Marathon (established in 2024) as the sixth fastest in the world. That’s well above the site’s rankings for Gold Coast (No. 32), Melbourne (No. 41) and Sydney (No. 48). “In 2025 [Ballarat] produced 406 sub-3 finishers from 2,341 finishers (17.34%), with a 2:16:54 winning time. This is a clear example of a race where field composition matters as much as scale,” Sub-3 notes. It’s not on our list because it currently has fewer than 5,000 finishers, but it will be interesting to see if Ballarat can maintain its exceptional proportion of sub-3:00 finishers as it continues to grow.

This relationship between scale and speed also explains why, where available, we’ve considered average (often meaning mean) times. The Running Channel estimates the worldwide average marathon time to be in the 4:15–4:20 range. Looking at US runners in 2024, Rock gives a precise median time of 4:25:33, a number he describes as meaningless due to huge variations across age and gender. For men aged 25-44 (the largest group of marathon finishers in Rock’s dataset), the median finish time was roughly 4:05. For women, the fastest age group is 20–24, where the median time was 4:28:48, and they get slightly slower as they get older (whereas men in their late 30s tend to be slightly faster than men in their late 20s). Rock generalises to say, “For young runners — in their 20s and 30s … the average finish time is around 4:05 for men and 4:30 for women.”

We’ve also listed the prize money on offer for each race; even if it doesn’t directly shape the speed of an event, it can provide insight into how much motivation the world’s best runners might have to enter these top-five events. Appearance fees are a black box and we haven’t speculated on them, but it’s safe to assume the world’s biggest races have the world’s biggest purses.

The best statistic of all might be one that isn’t readily available: the percentage of entrants who achieve a personal record. Interestingly, Australia’s Gold Coast Marathon – which prides itself on being flat and fast – makes a point of claiming that 60% of runners achieve a PR there. Not too many other big races publish this data.

One last note. Most of the races on this list are hugely popular and therefore difficult to get a starting bib for. A list of “Fast marathons that are also easy to get into” would be a different top five. Hey, that’s a good idea.

So without further ado, here is the Tempo Journal list of the world’s five fastest marathons, counting down from number five to number one. First though, we need to talk about Chicago.

CHICAGO MARATHON

2026 date: 11 October Typical temperature: 5–13ºC (39–55ºF) – but highly variable Elevation gain: 74m (243ft) Elevation loss: 73m (242ft)

Course records Men: 2:00:35 – Kelvin Kiptum, 2023 (WR) Women: 2:09:56 – Ruth Chepngetich, 2024 (WR)

Number of top 50 all-time fastest marathons: 2 Number of top 100 all-time fastest marathons: 8 Participation: 54,284 finishers (2025) Sub-three-hour: 4,054 or 6.4% (2025) Average time: Male 4:04:03, Female 4:35:03, Overall 4:20:01 Prize money: First US$100,000, Second US$75,000, Third US$50,000. Course record bonus: US$50,000

Hell yeah, Chicago’s fast. Both current world records were set here (even if Chepngetich’s may have lost some of its shine). Chicago accounts for 10 places in the all-time top-100 list, so we know it’s a beacon for elites.

The marathon’s October date usually means moderate autumn/fall temperatures (though the city is known for its fickle weather, and wind, rain or unseasonably warm conditions are always possible). The route is a kinky loop that starts and finishes in Grant Park near the shore of Lake Michigan, tracing the city grid with numerous 90º corners, and with bridges that account for most of the super-flat course’s elevation (you’d be hard pressed to argue between Chicago and Berlin for the flattest major). You take the good with the bad here.

And that, plus a widely-applied-for ballot, may explain why Chicago has a lower percentage of runners coming in sub-3:00 and why its average time is respectable but nothing crazy. So, Chicago is knocking on the door but it’s not in our top five.

Do you agree or disagree with our choice not to include Chicago in the top five? Leave us a comment in the Instagram post for this article!

BOSTON MARATHON

2026 date: 20 April Typical temperature: 5–17ºC (41–62ºF) Elevation gain: 248m (815ft) Elevation loss: 388m (1275ft)

Course records Men: 2:03:02 – Geoffrey Mutai, 2011 Women: 2:17:22 – Sharon Lokedi, 2025

Number of top 50 all-time fastest marathons: Not eligible (but see below) Number of top 100 all-time fastest marathons: Not eligible (but see below) Participation: 40,705 finishers (2025) Sub-3:00: 5,082 or 12.49% (2025) Average time: 3:53:05 (2024) Prize money: First US$150,000, Second US$75,000, Third US$40,000. CR bonus: US$50,000

We’ve already made it pretty clear that Boston is fast not because of its course but despite it. But it’s the world’s oldest, most prestigious marathon. Combine that with its rigorous qualification process and you get a race that any serious marathoner in the world dreams of doing. (The BQ is about to get even tougher from the 2027 race onwards, with steeply downhill races being penalised 5 or 10 minutes, or disqualified outright, depending on their net fall.)

Where Boston belongs on this list – if at all – was probably the hardest assessment we had to make. On one hand, you have the very high sub-3:00 scores. Those scores are high both proportionally – impressively achieved in a much bigger race than other events with higher proportional scores – and in absolute terms.

On the other hand, as mentioned already, Boston is not eligible for world records – it is point-to-point and narrowly exceeds the drop-per-km rules. Ignoring the advantages those facts might or might not confer (consider Boston’s hills), Mutai’s course record would only be 16th on the all-time top 100. His 2011 event was unusually fast – runner-up Moses Molop came in just behind him, in 2:03:06. Since then, not too many runners troubled the top-100 times, where the cutoff is currently 2:04:50 – until John Korir won the 2025 marathon in 2:04:45. This would place him equal 89th on the all-time top-100.

Based on these elite results, it’s hard to see how Boston belongs on a list of the fastest courses in the world. But by dint of the BQ process and the sheer quality and breadth of runners drawn to race there – elevating the sub-3:00 and average-time results – we place it at No. 5 on this list.

SEVILLE MARATHON

2026 date: 15 February Typical temperature: 8–15°C (46–59°F) Elevation gain: 64m (210ft) Elevation loss: 64m (210ft)

Course records Men: 2:03:27 – Deresa Geleta, 2024 Women: 2:22:13 for women – Azmera Gebru, 2024

Number of top 50 all-time fastest marathons: 1 Number of top 100 all-time fastest marathons: 2 Participation: 10,721 finishers (2025) Sub-three-hour: 1,655 or 15.44% (2025) Average time: No data available Prize money: First US$15,000, Second US$7,500, Third US$5,000. CR bonus $10,000.

Look at those mirrored, pancake-flat elevation stats – 64 metres up, 64 metres down – making Seville the flattest course in Europe. Look at that profile pic. The event is held in late winter, usually with perfect temperatures and low humidity. The route is designed for efficiency, running along wide boulevards through the historic city center and along the river. The race’s organisation, refreshment stations and pacers are all first rate.

All these factors combine to create an event that deserves to be considered alongside that of its more-famous compatriot city, Valencia. Seville doesn’t have the same prize pool or reputation as Valencia, which shows in its slower course records. But its proportion of sub-3:00 runners is high. That’s because it attracts serious runners from across Europe and beyond. The 2026 event is limited to 12,000 starters (down from 14,000 in 2025), and previous years’ events sold out more than six months in advance. Still, it’s not the most difficult race to get into and does not yet operate a ballot. Registration for 2027 opens in April.

CALIFORNIA INTERNATIONAL MARATHON

2026 date: 6 December Typical temperature: 6–14ºC (42–57ºF) Elevation gain: 202m (663ft) Elevation loss: 305m (1003ft)

Course records Men: 2:09:29 – Futsum Zienasellassie, 2025 Women: 2:24:09 – Molly Born, 2025

Number of top 50 all-time fastest marathons: Not eligible Number of top 100 all-time fastest marathons: Not eligible Participation: 8,178 (2025) Sub-3:00: 1,423 or 17.4% (2025) Average time: 3:58:37 (2023) Prize money: First US$20,000, Second US$12,500, Third US$9,000. NR bonus $10,000. CR bonus US$5,000. Prizes are offered to US citizens representing the country in international competition and with USATF membership.

The CIM begins at the Folsom Dam (yes, Johnny Cash fans, it’s very near Folsom Prison), north of Sacramento, then smoothly runs 42.2km point-to-point downhill to pull up outside the California State Capitol. Along the way, the course begins with rolling hills (the pro tip is not to go out too fast) before levelling off for a flat finish. Net downhill is 103m (340 feet) – enough to give you a bit of a boost but not enough to get caught out by the new BQ rules. The profile picture is a thing of beauty.

Wide roads and low temperatures built on predicable early December Northern California weather play their parts, too.

This is a medium-sized event that attracts the most serious of runners. Many come here chasing a PB, or a BQ or the US OTQ, and that shows in the sub-3:00 results. Its reputation as an event for the racing community (not just the running community) is reflected in its selection to host the USATF Marathon Championships five times in the past decade, including back-to-back in 2025 and 2026.

Surprisingly, it’s one of the easier races on this list to get into, and there’s no qualification time. For 2026, transferable, deferrable “worry-free entry” aka “gold” spots are still available for US$230. The cheaper, less flexible tiers have sold out.

BERLIN MARATHON

2026 date: 27 September Typical temperature: 11–18ºC (52–64ºF) Elevation gain: 73m (241ft) Elevation loss: 79m (260 feet)

Course records Men: 2:01:09 – Eliud Kipchoge, 2022 (former WR) Women: 2:11:53 – Tigist Assefa, 2023 (former WR)

Number of top 50 all-time fastest marathons: 15 Number of top 100 all-time fastest marathons: 19 Participation: >48,000 finishers from >55,000 registrations in 2025 (>54,000 finishers in 2024) Sub-3:00: 4,204 or 7.8% (2024) Average time: No recent data available Prize money: First €30,000, Second €15,000, Third €10,000. WR bonus: €50,000. Time bonuses for first and second and places only: €30,000 for sub-2:02:30 men, sub-2:17:30 women.

We could start by looking at the 34 top-100 all-time records achieved at Berlin. That’s more than a third of the chart! The men’s world record resided here in an unbroken run from 2003 to 2022, improving eight times (Haile Gebrselassie and Eliud Kipchoge each making two consecutive WR marks). Clearly, the world’s top elites run incredible times in the German capital.

The reasons behind that impressive honour roll include Berlin’s reputation as the flattest of the majors – arguably its six-metre/20-foot net negative gives it a slight advantage over Chicago. It’s a wide course that, somewhat miraculously for a major city, has very few sharp turns. Plus its late September placement normally offers cool autumn/fall temperatures and low wind. But last year’s event saw the mercury rise steeply, reaching 27ºC/80°F by midday.

Taking in many of this history-roiled city’s most famous landmarks, it’s both well-organised and a huge vibe. The course includes 15 well-spaced and well-equipped hydration and refuelling stations. Top-level pacemakers and a comparatively high proportion of runners targeting a sub-3:00 result will mean there’s a pace group for you, pushing you on when the going gets tough. One last intangible benefit is the party atmosphere and massive crowd energy – the live music zones scattered throughout the course should give you a BPM-fuelled boost.

VALENCIA MARATHON

2026 date: 6 December Typical temperature: 12–17ºC (54–63ºF) Elevation gain: 62m (204ft) Elevation loss: 67m (222ft)

Course records Men: 2:01:48 – Sisay Lemma, 2023 Women: 2:14:00 – Joyciline Jepkosgei, 2025 (CR)

Number of top 50 all-time fastest marathons: 12 Number of top 100 all-time fastest marathons: 21 Participation: 30,669 finishers (2025) Sub-3:00: > 5,533 or 17.4% (2025) Average time: Male 3:33:30, Female 4:00:00, Overall 3:39:12 (2024) Prize money: €75,000, CR bonus €30,000, WR bonus €1,000,000

Think of the Valencia Marathon as an event genetically engineered for fast times. Billing itself as the City of Running, Valencia has crafted a looping, virtually flat sea-level course with wide avenues and almost no sharp corners. The race is held in early December, during the mild Spanish winter, and usually produces optimal marathon weather.

The event goes out of its way to attract the best runners. While other marathons offer a bonus for breaking the world record, Valencia’s is more like a most-wanted bounty: €1,000,000 to anyone who can bring it in, dead or alive.

The results speak for themselves. It’s men’s course record is only one minute, 13 seconds off the world record. In 2025, 10 national records fell there; both of Australia’s national records were earned in the Spanish city (Andy Buchanan’s in 2024 and Jessica Stenson’s in 2025). A staggering 33 of the world’s top-100 all-time races have been run here.

It’s not only at the super-elite end that Valencia shines. In combination, the marathon has the highest proportion (17.4%) and absolute number (5,533 in 2025) of fast amateurs producing sub-3:00 results of any of the world’s top 20 races. The marathon previously ran a personal best incentive program that awarded sub-elite runners – those coming under 2:20 for men or 2:45 for women – between €2,000 and €4,000 depending on by how much they could beat their own best documented time.

The course covers numerous historic landmarks but is most famous for its finishing straight: a spectacular 250-metre blue runway suspended over water in front of the Príncipe Felipe Science Museum. It’s exceptionally well organised, with 500m/547-yard (!) refreshment stations approximately every 3km/1.86mi offering water, isotonic drinks, fruit and gels. Top-tier pacers guide groups targeting 2:50 and up.

It’s hard to find anything bad to say about Valencia except, perhaps, that it’s now become a victim of its own success. This year sees the first implementation of a ballot system, one which grants previous entrants better odds to reward loyalty. There are 36,000 bibs available but it’s a bit of a mystery how many people applied (the window closed not long ago). The 2025 race reportedly sold out in roughly a week. Still, these chances aren’t that different to many other big races around the world. If you can get there, and get in, then Valencia gives you every chance of running your fastest race.