The 10 Flattest Marathons in the World

If you've got your sights set on a fast marathon day, the difference between a good race and a great race could be in the margins. Choosing a course that works for your race plan matters more than most runners realise.

You can nail your training block, dial in your nutrition, and show up in the best shape of your life, but pick a hilly course and you'll leave time on the road. Pick a flat one, and the course works with you, not against you.

This guide breaks down the flattest marathons in the world, the courses with the lowest elevation gain, the smoothest profiles, and the best conditions for a personal best.

Whether you're chasing a sub-3, targeting a Boston qualifier, or simply want your first marathon to feel as manageable as possible, these are the courses worth putting in your calendar.

It's not just about hills. A truly flat marathon course has minimal total elevation gain (the cumulative metres of uphill across the whole 42.195 km), a smooth road surface, few sharp turns that force you to brake and re-accelerate, and no bridges or overpasses that create unexpected climbs.

As a rough guide, courses with under 50m (164ft) of total elevation gain are considered genuinely flat and fast. Courses between 50–100m (164–328ft) are still very manageable. Anything above 150m (492ft) starts to eat into your time.

We've also included race day temperatures, because heat and humidity matter just as much as gradient. The ideal marathon temperature sits around 8–12°C (46–54°F), cool enough to keep your core temperature down, warm enough to keep muscles loose.

📍 Location: Berlin, Germany

📅 Typical date: Last Sunday of September

⬆️ Elevation gain: ~73m (241ft)

🌡️ Average race day temp: 15°C / 59°F

If there's one marathon that runners and coaches point to when someone asks 'where should I run my fastest time?', it's Berlin. The course is famously pancake flat, seven marathon world records have been set here, including Eliud Kipchoge's current men's record of 2:01:09.

The streets are wide, the crowd support is phenomenal, and the finish under the Brandenburg Gate is one of the most iconic moments in marathon running. There are no significant climbs, no bridges, and the surface is smooth asphalt throughout.

Late September in Berlin is generally ideal for marathon running: cool temperatures, low humidity, and light winds. Be aware that in warmer years temperatures can creep higher, so keep an eye on the forecast in race week.

📍 Location: Chicago, Illinois, USA

📅 Typical date: Second Sunday of October

⬆️ Elevation gain: ~74m (243ft) up / ~73m (240ft) down

🌡️ Average race day temp: 13°C / 57°F

Chicago is Berlin's closest rival for the title of the world's flattest major marathon. The two courses are almost identically flat, and Chicago's wide lakefront roads and long, straight sections make it just as well-suited to fast running.

Both the men's and women's marathon world records have been set in Chicago - Kelvin Kiptum's 2:00:35 in 2023 and Ruth Chepngetich's 2:09:56 in 2024. The course runs through multiple Chicago neighbourhoods, giving it a real big-city marathon feel with enormous crowd support throughout.

October in Chicago is typically cool and crisp, ideal marathon conditions. The main wildcard is wind off Lake Michigan, which can occasionally make sections feel harder than the profile suggests.

📍 Location: Valencia, Spain

📅 Typical date: First Sunday of December

⬆️ Elevation gain: Under 30m (98ft) total

🌡️ Average race day temp: 10–16°C / 50–61°F

Valencia is arguably the flattest significant marathon on the planet. The entire 42.195 km is run at sea level across wide, smooth avenues, with less than 30 metres of total elevation gain. No hills. No bridges. No overpasses. Just road.

The results speak for themselves. Valencia holds a World Athletics Platinum Label (the highest possible certification) and has consistently produced some of the fastest times in history. Sisay Lemma ran 2:01:48 here in 2023. Letesenbet Gidey set the women's course record at 2:14:58, also in 2023.

Early December in Valencia is close to perfect for marathon running: temperatures typically sit in the 8–16°C range (46–61°F), with low humidity and minimal wind. Sports scientists put the optimal marathon temperature at around 10–12°C, and Valencia hits that window almost every year.

📍 Location: Tokyo, Japan

📅 Typical date: First Sunday of March

⬆️ Elevation gain: ~60m (198ft) up / ~98m (322ft) down

🌡️ Average race day temp: 6°C / 44°F

Tokyo is one of the World Marathon Majors and also one of the flattest, with a slight net downhill that helps runners find their rhythm in the opening kilometres. The first 5 km are gently descending, making it naturally conducive to a fast start.

What makes Tokyo unique is its combination of flat course and near-ideal weather. Early March in Tokyo is cool and dry - averaging around 6°C (44°F) at race time - which puts it close to the optimal marathon temperature window. Tokyo also has a notably clean, well-organised race experience, though it has a few more turns than Berlin or Valencia.

One caveat: getting a place is tough. Entry is by lottery and demand is enormous. If you manage to get in, make the most of it - it's one of the most special marathon experiences anywhere in the world.

📍 Location: Houston, Texas, USA

📅 Typical date: Second Sunday of January

⬆️ Elevation gain: ~60m (196ft) - with 92% of the course classified as flat

🌡️ Average race day temp: 12°C / 54°F (range: 5–17°C / 41–63°F)

Houston is the great underrated flat marathon. Over 92% of the course is genuinely flat, the only notable climb is a brief freeway overpass around mile 12.7, a 4.7% grade for about 160 metres. That's it. Blink and you'll miss it.

Held in January, Houston regularly attracts fast fields and produces strong times. The Olympic Marathon Trials were held here in 2012. Around 13–17% of finishers qualify for Boston in a typical year. Race day temperatures average around 12°C (54°F), which is close to ideal - though Houston can occasionally surprise with warm or humid conditions, especially later in the morning.

If you're a US-based runner looking for a flat, January race with a real shot at a PB or BQ, Houston deserves a spot on your shortlist.

📍 Location: London, UK

📅 Typical date: Last Sunday of April

⬆️ Elevation gain: ~127m (417ft) up / ~161m (528ft) down

🌡️ Average race day temp: 11°C / 52°F

London is one of the most popular marathons in the world for good reason. It's not as flat as Berlin or Valencia - the 127m of elevation gain puts it in a slightly different bracket - but the course trends slightly downhill overall, the road surface is excellent, and the crowd support is extraordinary from start to finish.

The sight of Tower Bridge at around mile 13 is one of the defining marathon experiences anywhere. April in London is typically mild and manageable, though spring weather in the UK can occasionally deliver warm conditions or rain.

Kelvin Kiptum ran 2:01:25 at London in 2023 - just 16 seconds off his world record - which gives you an idea of what this course can produce.

📍 Location: Gold Coast, Queensland, Australia

📅 Typical date: First Sunday of July

⬆️ Elevation gain: ~8m (26ft) elevation difference - essentially zero

🌡️ Average race day temp: 13°C / 57°F (range: 8–19°C / 48–67°F)

Gold Coast is the flattest marathon in the Southern Hemisphere, and it's genuinely extraordinary. The course runs north and south along the Gold Coast Highway with an elevation difference of just 8 metres - that's not a typo. It is as close to perfectly flat as a road marathon gets.

Held in the Australian winter (July), conditions are ideal: cool temperatures, low humidity (below 40%), and minimal wind. Around 60% of finishers set personal bests here, which says everything. It holds World Athletics Label status and is Australia's premier marathon event.

The course itself runs alongside surf beaches and broadwater, with views of the Pacific and a coastal atmosphere that makes it feel less like hard work than it actually is. If you're in Australia or planning a running holiday, this is the one.

📍 Location: Rotterdam, Netherlands

📅 Typical date: Mid-April

⬆️ Elevation gain: Minimal - one of Europe's flattest courses

🌡️ Average race day temp: 10–14°C / 50–57°F

Rotterdam is the Netherlands' fastest marathon and one of the flattest in Europe, though it gets less international attention than Amsterdam. The course is virtually entirely flat, running through the city and along the waterfront, and mid-April conditions are typically cool and manageable.

For runners who can't get into Berlin or want an alternative fast European spring race, Rotterdam is an excellent choice. Fields tend to be smaller and more competitive than the mega-majors, and organisation is excellent. It's particularly popular with runners chasing sub-3 or sub-4 times.

📍 Location: Amsterdam, Netherlands

📅 Typical date: Third Sunday of October

⬆️ Elevation gain: Very flat - passage through the city and its canal networks

🌡️ Average race day temp: 9–13°C / 49–56°F

Amsterdam's marathon course is extremely flat, winding through the city's canal-lined streets and passing under the famous Rijksmuseum. October conditions in Amsterdam are typically cool, which suits distance running well.

The one caveat mentioned by runners is the number of turns, the urban course layout means you're constantly navigating bends and corners, which requires more effort than a long straight road and can cost time. That said, for a scenic city marathon with a flat profile, Amsterdam is hard to beat.

📍 Location: Singapore

📅 Typical date: First Sunday of December

⬆️ Elevation gain: ~215m (705ft) - flat terrain, but not the flattest

🌡️ Average race day temp: 26–28°C / 79–83°F, with 80–90% humidity

Singapore is a special case on this list. The terrain itself is relatively flat, the course runs past Marina Bay Sands, the Gardens by the Bay, and the Singapore Flyer. But the elevation gain of around 215 metres is higher than most races on this list, and the real challenge has nothing to do with hills.

Singapore races in December, which is its wet season. Temperatures hover around 26–28°C (79–83°F) with relative humidity often approaching 90%, even at the early 4:30am start time.

Elite runners consistently run 5–20 minutes slower than their personal bests here. In 2025, the men's winner ran 2:15:40, more than five minutes slower than his PR.

So why include it? Because Singapore is an incredible experience. It's Southeast Asia's only World Athletics Gold Label race, running through one of the most visually spectacular urban environments in the world at night. You come for the experience, the atmosphere, and the city - not primarily the time.

Here's a summary to help you choose the right course for your goals:

There's a common misconception that flat courses require no specific preparation. That's not quite right!

Running on a flat course for 42 km uses the same muscle groups in the same pattern for a very long time, without the variation of ups and downs that hills naturally provide. This can lead to fatigue in specific muscle groups, particularly your quads and hip flexors, earlier than you might expect.

So we suggest adding some elevation in your training, like some incline on the treadmill, or hill reps, to balance the training load on your muscles. Afterall, nowhere

Whatever course you choose from this list, the principle is the same: pick a flat race, train specifically for it, and give yourself every possible advantage on race day.

The course can do a lot of the heavy lifting, but only if you show up prepared.

Runna's marathon training plans are built around your current fitness, your goal time, and your race date, so whether you're targeting Berlin in September, Valencia in December, or Gold Coast in July, your plan adapts to get you there in the best possible shape.

Not sure which race to target yet? Check out Races by Runna, our race discovery site where you can browse marathons by location, date, and distance to find the perfect event for your goals.

Whether you're eyeing a spring European flat-fest or a winter PB attempt, it's the easiest way to find your next start line.