How many carbs per hour for Madrid Marathon?

At a typical finish of 4 h, the research range is 60 to 90 g an hour, as glucose and fructose, set by how trained your gut is. Enter your own finish time above for your number.

What is the weather like at Madrid Marathon?

Temperatures run from about 6 to 18 °C (43 to 64 °F): Average daily low and high in Madrid in April (Weather Spark). Heat raises your sweat rate, so do a sweat test in similar weather.

Where are the aid stations at Madrid Marathon?

The organizer lists 15 aid stations; the table on this page has each one by km. Check the athlete guide in race week, as positions can change.

Marathon

Madrid Marathon fuel plan: carbs, fluid and sodium per hour.

April 25, 2027, Madrid, Spain. Set your finish time and the plan follows.

Distance: 42.195 km
Climbing: Not published
Typical temperature: 6 to 18 °C · 43 to 64 °F
Aid stations: 15

Your plan

Marathon · 4 h

Carbs an hour

75g

The research range for this race is 60 to 90 g; your gut training sets where you start. Above 60 g, use glucose and fructose, about 2:1.

Jeukendrup 2014 Viribay 2020 +4 more

Fluid an hour

To thirst

Without a sweat rate the research says drink to thirst. Do the sweat test to get a range.

NATA 2017 ACSM 2007

Sodium an hour

300 to 1,000mg

Sweat sodium varies a lot between people. A sweat sodium test gives you your own number.

Baker 2017 NATA 2017 +1 more

About 300 g of carbs over the race. That is a 25 g gel every 20 minutes, or the same carbs from drink and chews.

Rehearse it in training first: the gut adapts in 2 to 4 weeks. Costa 2017

Hand it to your AI

Your AI can check these numbers against your training and adjust them. The prompt has your results filled in.

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I'm racing a Marathon and expect to finish in 4 h. I haven't measured my sweat rate. Conditions look mild, and my gut is in some training for fueling. A race fuel calculator built on the research (Jeukendrup 2014, the ACSM 2016 position stand) gave me: 75 g carbs an hour (glucose and fructose, about 2:1), about 300 g in total; fluid: drink to thirst, no sweat rate yet; 300 to 1,000 mg sodium an hour. Check this against my training and how my gut has handled fueling, then build my race day plan: what to take and when, with real products I can buy.

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Gemini, Grok Bot, Dots, Muse and Cue: copy the prompt and paste it in.

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With Memory.fit, your AI would already know your sweat rate.

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The course

What to know about Madrid Marathon.

The race starts on Paseo de la Castellana at Plaza Gregorio Marañón and finishes on Paseo de Recoletos between Cibeles and Colón. It passes the Bernabéu Stadium, the Cuatro Torres, Puerta del Sol, the Royal Palace, Casa de Campo, Madrid Río and the Prado Museum. The course is rolling rather than flat.

On course: POWERADE isotonic drink, 226ERS gels at km 30, bananas. Train with what the course hands out, or carry your own.

Km	Leg	What's there
5	run	water, POWERADE
10.5	run	water
11	run	POWERADE
15	run	POWERADE
16	run	water
20	run	water
23	run	POWERADE, bananas
25	run	water
26.5	run	POWERADE
29	run	water, POWERADE, bananas
30	run	226ERS gels
32	run	water, POWERADE
35.8	run	water, POWERADE
38	run	water, POWERADE, bananas
40	run	water, POWERADE

Race details checked November 3, 2026 from rocknrollmadridrun.com, rocknrollmadridrun.com, rocknrollmadridrun.com, esmadrid.com, weatherspark.com. Courses and aid stations change: check the official page in race week.

Train for it

Train for Madrid Marathon with your AI.

With Memory.fit, your AI reads your real training, sleep and fuel, plans your weeks toward race day and shows the plan in the app.

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Questions

Madrid Marathon: questions.

At a typical finish of 4 h, the research range is 60 to 90 g an hour, as glucose and fructose, set by how trained your gut is. Enter your own finish time above for your number.
Temperatures run from about 6 to 18 °C (43 to 64 °F): Average daily low and high in Madrid in April (Weather Spark). Heat raises your sweat rate, so do a sweat test in similar weather.
The organizer lists 15 aid stations; the table on this page has each one by km. Check the athlete guide in race week, as positions can change.

More races

Fuel plans for races like this one.

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Not medical advice. Memory.fit is not affiliated with Madrid Marathon or its organizer.

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