Marathon des Écluses de la Mayenne.
The Marathon des Écluses de la Mayenne is a point-to-point race from Martigné-sur-Mayenne to Laval that spends most of its distance on the towpath along the Mayenne, passing 18 locks on the way. Running it well is mostly about holding a rhythm over a long, uniform river section with few landmarks to break it up.
Marathon des Écluses de la Mayenne 2027: Course, Route Profile & Map
The start is on Rue Spica in Martigné-sur-Mayenne. The first 13 km or so stay on the higher ground around the village, between roughly 115 and 140 m, gently rolling with no real climbs. Around km 13 the course drops about 35 m in a little over a kilometre down to the Mayenne, and from there you stay by the river almost all the way to the finish.
From that point the course is essentially one long, slightly downhill line: the towpath follows the Mayenne downstream for about 28 km and loses only some 30 m more, spread across the lock steps. At km 22 the half marathon joins from the river halt at Montgiroux, and around km 33 you pass Saint-Jean-sur-Mayenne, where the 2026 cut-off was placed. Aid stations come roughly every five kilometres.
The name says it all: lock after lock, the river carries you through the Mayenne countryside before the course leaves the towpath in Laval and finishes at the Square de Boston in the town centre. The race is held at the end of September; 2027 is the 32nd edition, with pacers and an officially measured course.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 12.2 | 0.5 km | 3.2 % | 3.6 % | +15 m | — |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace Marathon des Écluses de la Mayenne.
Start under control
The opening section on the higher ground around Martigné is the only part with any noticeable up and down. Run it by feel rather than by the watch: the small rollers cost a little time, and forcing goal pace through them is paid back later by the river. The descent to the Mayenne around km 13 is short and gentle enough to take relaxed, without braking.
Hold your rhythm
The race is decided on the towpath between km 25 and 38. The course there is flat and monotonous, the locks follow one another at short intervals, and there are few turns or gradients to set the pace for you. This is exactly where pace drifts without you noticing. Use the locks as markers and check your pace at fixed intervals.
Spend what is left
The trap is where the half marathon joins at km 22: fresh half-marathon runners who started a short while earlier will pull the pace up. Stay with your own rhythm and do not latch onto them.
Training plan for Marathon des Écluses de la Mayenne: 12-week build
Build the base
For an age-group runner the course means roughly three to five hours of effort, almost entirely at a steady aerobic intensity. There are practically no anaerobic spikes on this route; the challenge is the duration and the sameness.
Train race pace
The kilometres that decide the race come in the second half on the towpath, flat and without variety. Do your long runs on purpose on flat, monotonous paths, along a canal or a river, and run the final 8 to 12 km at marathon pace. That trains you to hold pace without outside cues once your legs are already tired.
Rehearse the course
Because the course runs net downhill, there is no need for specific hill work. More important is taking the first 13 km over rolling ground under control: runs with a slightly rolling first part and a flat finish reproduce exactly that.
Arrive fresh
The race is held at the end of September. Plan your build so that the longest runs fall in August and early September, and practise fuelling at intervals of about five kilometres, the spacing the course offers.
Courses
Download the Marathon des Écluses de la Mayenne course as a GPX file for your watch or bike computer.
Let YOUB adapt your plan for Marathon des Écluses de la Mayenne dynamically
Ben connects your goal, the course, current load, recovery, and calendar. Your plan stays pointed at race day even when real life is not perfectly plannable.
Everything about Marathon des Écluses de la Mayenne.
How long is Marathon des Écluses de la Mayenne?
Marathon des Écluses de la Mayenne is 42.2 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
How much elevation gain does Marathon des Écluses de la Mayenne have?
Marathon des Écluses de la Mayenne has around 206 m of elevation gain over 42.2 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of Marathon des Écluses de la Mayenne?
Marathon des Écluses de la Mayenne is classified as Flat, averaging 4.9 vertical metres per kilometre. 60% of the route is flat, 18% climbs moderately (2 to 6%) and 0% is steeper than 6%.
What climbs does Marathon des Écluses de la Mayenne have?
The hardest climb of Marathon des Écluses de la Mayenne starts at kilometre 12.2, runs for 0.5 km at an average of 3.2% and gains 15 metres.
Is Marathon des Écluses de la Mayenne a loop course?
No, Marathon des Écluses de la Mayenne is a point-to-point course: start and finish are in different places.
Is there a GPX file for the Marathon des Écluses de la Mayenne course?
Yes. The Marathon des Écluses de la Mayenne course is on this page as a free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for Marathon des Écluses de la Mayenne?
Preparation for Marathon des Écluses de la Mayenne should account for 42.2 km, 206 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for Marathon des Écluses de la Mayenne?
The pacing strategy for Marathon des Écluses de la Mayenne should reflect 42.2 km, 206 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does Marathon des Écluses de la Mayenne take place?
Marathon des Écluses de la Mayenne takes place on September 26, 2027.
Where does Marathon des Écluses de la Mayenne take place?
Marathon des Écluses de la Mayenne takes place in Laval, France.
Which distances does Marathon des Écluses de la Mayenne offer?
Marathon des Écluses de la Mayenne offers 3 distances — Marathon: 42.2 km; Semi-Marathon: 21.1 km; 10 km: 10 km.
How do I register for Marathon des Écluses de la Mayenne?
Registration runs through the organiser: marathondesecluses53.org. YOUB shows you the course, elevation profile and training plan for your preparation.
