One Light, Two On, Three Tri, let’s go! Head to the Meuse for the LIGHT ON TRI de Madine***, the new must-attend event for triathletes in the Grand-Est region... and maybe soon for you too! 😉 We’ll meet at the end of September in Nonsard-Lamarche, between Metz and Nancy, for an incredible triathlon with nearly a thousand participants annually 🔥. Needless to say, it’s going to be competitive at the starting line! 💪 Come on, make your choice... Whether it's the S format or M format, there’s something for everyone. We've even heard rumors 🦻 that the L format is making a grand comeback !
Nestled in Lorraine, the race starts at Lake of Madine 🏁, an 11 km2 artificial lake that serves as a biodiversity reserve 🦆, and is also the largest lake in the region 💧. Quite impressive 😮. This area is perfect for outdoor sports with its hilly paths, the Côtes de Meuse, meadows 🌼, and woodlands 🪵. Everything’s in place for a sporting experience full of challenges! ⚡️ Don’t forget your sunglasses 😎, not just because you’ll shine (which we’re sure you will), but because there’s a good chance the sun will make an appearance for our enjoyment... 🌞 Yes, at this time of year, an Indian summer is guaranteed! Temperatures will hover around 20°C, though the water might be a bit chilly 🥶, so wearing a neoprene wetsuit is highly recommended! ⚠️ Conditions that are quite pleasant "all nice and snug" as our friends from the Grand-Est say, for a weekend of great sport and sharing! 😍
And if you're the tireless type 🤪, with energy to spare, explore the surroundings. You won’t be disappointed! 🤫 Just a few kilometers from Nonsard-Lamarche, the Montsec's Butte is a solitary hill offering a spectacular panoramic view 👀 of the entire Woëvre plain and Lake of Madine, making it a favorite spot for hikers with its 360° natural vista 🏞️. For a slightly more cultural visit 🤓, head to Vent des forêts 🌳, a preserved natural site where natural beauty and contemporary art meet over 45 km of trails 🚶♂️➡️. But don’t worry, we’ve also considered your taste buds... 😋 After all that exercise 🚴♀️, it's normal for your stomach to grumble. Luckily, the Grand-Est region is rich in exceptional dishes! Enjoy yourself in the land of pâté and quiche lorraine 🥧. Awaken your taste buds with the unique flavor of local truffles, and end with a sweet note 🍭 with madeleines from Commercy, the famous madeleines (of Proust) that inspired Marcel... *drum roll 🥁* Proust (unsurprisingly)! 🙂↕️
So, are you charmed by the allure of the Grand-Est? The LIGHT ON TRI de Madine*** 🏊 triathlon is waiting just for you! 🫵
What's on the agenda? Dive headfirst into the lake 🙂↕️ for two loops 🔁 of 950 m 🏊♂️, followed by a quick Australian exit to speed up the transition and get a strong start! 🏁 Then, you move on to 85 km on a bike course split into two loops of 42.5 km 🚴♂️. Expect moderate climbs that will require you to manage your pace 🫵. There's a bit of elevation, but nothing too daunting, don’t worry! 😉 For dessert, 21 km in three loops around the lake 🏃♂️. The terrain alternates between gravel sections and flora 🌿, ensuring you give it your all right up to the last meter... ⚡️
We dive right in 🏊 with two loops 🔁 of 750 m, making a total of 1.5 km in the calm waters of Lac de Madine 💧. Adding a touch of excitement 🤪, there's an Australian exit 🇦🇺 for a quick transition! On the cycling side 🚲, you'll ride a hilly loop with 400 m of elevation gain 🚵♂️, alternating between fast sections and moderate climbs on the local roads, offering you a chance to explore the region 🤩. Finish with the run, consisting of two mostly flat loops around the lake, with gravel and grass sections 🌿, and some bursts to test your legs! 🦵
This demanding course combines technique, effort management, and strategy in a uniquely natural setting! 😍
Dive straight into the deep end 🏊♂️ with a unique 500 m loop in the calm waters of Lake Madine 💧. No fuss, it's an Australian exit 🇦🇺 for a quick transition! 🚀 Then, take on 20 km of cycling 🚴♂️, spread over two loops of 10 km, with an elevation gain of 130 m. The course is flat, perfect for stretching out and testing your speed. 🏁 Finally, finish with 5 km of running 🏃♂️, on a mixed terrain course around the lake ! 💨
You can collect your bib the day before the race or on race day (depending on the event). An official photo ID is required.
Friday, September 18, 2026:
5:00 pm – 7:00 pm
Saturday, September 19, 2026:
7:30 am – 9:00 am: L*** bib pickup
10:00 am – 10:45 am: MINI-KIDS and KIDS bib pickup
4:30 pm – 5:15 pm: 7 km run bib pickup
Sunday, September 20, 2026:
7:00 am – 8:30 am: S* bib pickup
11:30 am – 1:00 pm: M** bib pickup
L Triathlon: Saturday, September 19, 2026 at 9:30 am
Kids 1 (2017–2020): Saturday, September 19, 2026 at 11:00 am
Kids 2 (2013–2016): Saturday, September 19, 2026 at 11:30 am
7 km run: Saturday, September 19, 2026 at 5:30 pm
S Triathlon: Sunday, September 20, 2026 at 9:00 am
M Triathlon: Sunday, September 20, 2026 at 1:30 pm
Your entry includes:
Swim cap provided and mandatory during the race.
Race bib and timing chip (must be returned—otherwise a €50 fee will be charged).
There is a bike park at Lake Madine, on the Nonsard-Lamarche side.
Yes, for non-licensed athletes: a medical certificate stating no contraindication to triathlon in competition, issued within the last 12 months, is mandatory.
Refreshments are provided by the organizers only. Outside support/aid is not allowed.
S Triathlon: from Cadet category (born in 2010 or earlier)
M Triathlon: from Junior category (born in 2008 or earlier)
L Triathlon: from Junior category (born in 2008 or earlier)
Kids 6–9 years: born in 2017, 2018, 2019 or 2020
Kids 10–13 years: born in 2013, 2014, 2015 or 2016
7 km run: born in 2010 or earlier
For the L Triathlon:
Swim cut-off: 1h10
Bike cut-off: 5h30
For the M Triathlon: bike cut-off at 3h
For the S Triathlon: no cut-off time
Provided swim cap is mandatory for the swim.
Wetsuit is mandatory if the water temperature is below 16°C (recommended in all cases).
Timing chip must be worn around the left ankle.
A race belt is mandatory for all events (3 attachment points).
Yes. Rankings are by gender and age group.
M Triathlon: prize money for the top 5 men and women (up to €100 for 1st place).
S Triathlon: no prize money, but podium awards.
In September at Lake Madine, average temperatures are around 17°C to 21°C, and it can be cooler in the morning.
For any other request, please email: hello@lightontri.com
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