Pi Marathon 2027
- Next event : Sun, March 14, 2027Date confirmed
The event in a few words
What if, for once, math made you want to run? 🏃
π = 3.14. 3 relay runners. 14.065 km each. And together, a marathon 🤝. Welcome to the Pi Marathon, a new relay race format coming to Paris in March, on a symbolic date. March 14 is Pi Day, the international day dedicated to the famous number π. The principle is simple: there are 3 of you, each runs 14.065 km and, together, you complete the mythical marathon distance 🔗 .
A marathon shared by three, that's the whole idea of the Pi Marathon: sharing the effort, handing over the relay and experiencing the 42.195 km 🔂 together. With friends, colleagues or family, everyone brings their part to the equation. With a little over 14 km per person, the format brings together very different profiles: regular runners, 10K enthusiasts, marathoners or simply three people close to each other looking for a new challenge 🥁.
14.065 km is your share of your team's marathon. Three relay runners, three efforts and one finish line: the 42.195 km one. For this first Paris edition, the Pi Marathon sets up in the west of the capital, around Parc Monceau and the 17th arrondissement, with the ambition of offering a fast course in the heart of Paris. Each relay runner completes two loops before meeting their teammates again in the relay zone and handing over the baton ↔️ . A moment that is an integral part of the experience: you cheer on the runner, you wait for your teammate, you take the relay… and the team's story moves forward with each handoff 📕.
The Pi Marathon is also that collective experience: waiting for your partner, cheering them on, passing them the relay, taking your share of the challenge and experiencing together the completion of the 42.195 km. Some will come chasing a time and to measure themselves against other teams ⏱️. Others will come to share a sporting adventure with their loved ones🫂. To each their own goal, the same equation: be three to complete a marathon 🎯. And since π is at the heart of the story, see you on March 14, for Pi Day. Paris will celebrate π in its own way: with thousands of runners gathered around a very simple equation.
3 × 14.065 km = 42.195 km.
3 runners. 1 marathon. An adventure to share.
On your marks…
Pi, go! π
4 reasons to join this race
A word from the organizer:
"The Pi Marathon was born from a simple desire: to experience running differently, to run together and come together. In 2011, the first edition was held in Le Mans, on the official 24 Hours of Le Mans circuit. A real success, with the capacity reached quickly. Today, running is enjoying a new momentum. Runners are no longer looking only for a time: they crave new experiences, different formats and shared moments. The Pi Marathon fits into this dynamic. Its principle is clear: a relay format on an easy-to-read 7 km loop, allowing everyone to cover 14 km (2 loops) within a team. A balance between a personal challenge and a collective adventure. More than a race, the Pi Marathon is a proposal: to run together, to pass it on, to share an effort and a powerful moment. Our ambition is to build a structuring event for the area, bringing together clubs, volunteers, companies and running enthusiasts. The Pi Marathon is an invitation to experience running differently."
The distance you'll all agree on
14 kmTOP
- Sunday, March 14, 2027 at 9:00 AM
- 14 km
A few more words
At this event, you’ll find only one race ☝️. The one and only unique one: that way, there’s no risk of lining up at the wrong start 🏁.
The course is split into three identical segments of 14.065 km. If you’re a sharp mathematician, that does indeed make a total of 42.195 km 🧮. Each relay runner must complete two loops of a 7.0325 km circuit laid out in the heart of the Bois de Boulogne 🔁. The profile is extremely flat, with an elevation gain close to 0 m per loop, making it a fast, accessible course ⚡.
You’ll weave between the wooded areas and the water points, clearly visible to spectators who come out in force for the occasion 🗣️. The relay handoff takes place in a dedicated zone, concentrating all the tension and energy of the runners 🏃. Points of interest include the proximity of the racecourse and the area’s peaceful undergrowth, which only the steady sound of your footsteps will disturb. And don’t forget to enjoy it! 😉
Frequently asked questions (FAQ)
Bibs are collected by a single person per team, carrying the BIB PASS, during the time slots that will be communicated by the organization starting January 1, 2027.
The start of the Pi Marathon will be given on Sunday, March 14, 2027, i.e. 03/14 = the anniversary date of PI DAY around the world, at 9 a.m. in the Bois de Boulogne, in Paris.
The start and finish are located in the same place.
If you are an adult, you must present an FFA Athletics Competition, Corporate or Running license, or a Pass Prévention Santé (PPS) number at a rate of €5, dated less than one year on race day.
For minors, a health questionnaire can replace the medical certificate if it contains only negative answers. The documents must be provided online before September 5, 2026 at 8 p.m.
Rates per team of 3 runners change depending on availability:
€99 for the first 300 teams
€109 for the next 400 teams
€119 for the next 300 teams
€129 beyond these quotas
These prices do not include the registration platform fees.
The maximum time allowed to cover the total marathon distance by the three relay runners is 5 hours.
Yes, you must have been born in 2012 or earlier.
There will be two refreshment points: 1 at the halfway point of the loop and 1 at the finish.
You can check the race rules here
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