
Two laps of the lake at Gué de Selle make up the 8 km of the Courses Nature des Coëvrons, the shortest and flattest of the three routes at Mézangers. This is trail running with almost no climbing, so no hill sets your pace: that job is entirely yours.
Start and finish are at Gué de Selle in Mézangers, and the course is two 4 km laps around the lake. Where the two longer distances head out to Montaigu, this one stays by the water. That makes it the only route of the day on which you always know what is coming: after the first lap you have seen every metre.
Underfoot are the forest paths and trails of the Coëvrons countryside. About three quarters of the course is flat, and the rest is made up of undulations of a few metres, gathered in the second half of each lap. None of them is a climb in any real sense, and together they add up to little more than 30 metres.
The lap starts and ends in the same place, so you pass the start once at halfway. That gives the race a structure a point-to-point course lacks: at Gué de Selle you read your split after 4 km, and from there the only question left is whether you can repeat it.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|
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.
The terrain will not distribute the effort for you here. So think of the course as its two laps: the first brisk but controlled, the second at least as quick. Run the small undulations by feel rather than by the watch, because they are too short to gain time on or to recover on.
The race is decided on the second lap, more precisely in its second half. The undulations come round again, now on tired legs, and anyone still holding pace there will pass those who held it for only 4 km.
The real trap is road pace. A flat course invites you to target what you would run for 8 km on tarmac, but on forest paths and trails the same stride costs more. Bring that number with you and you will overreach on the first lap. Run by breathing and effort instead, and treat your split at Gué de Selle as information, not as a target.

Depending on your fitness, expect 40 to 60 minutes. That is a sustained hard effort close to threshold: no climbs to create spikes, but no descents to breathe on either. What counts is the ability to hold an uncomfortable pace for a long time, not strength on a hill.
The key session comes straight from the format. Run two sets of 4 km at target race pace with a short jog between them, and shorten the jog from week to week. That rehearses exactly the task at hand: not running the second lap slower than the first. The aim is an even session, not the fastest possible first half.
Put part of this tempo work on forest paths rather than only on tarmac or the track. Away from tarmac you learn which effort produces which pace, and you get an honest picture of what to expect on race day. Short strides on trails also build the sure footing that saves energy at speed on this kind of surface.
An early April date means the weeks that matter fall in February and March. If you have run easily through the winter, start the tempo work six to eight weeks out rather than squeezing in a few hard sessions at the last moment.

Download the Courses Nature des Coëvrons course as a GPX file for your watch or bike computer.
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.
Courses Nature des Coëvrons is 8 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
Courses Nature des Coëvrons has around 31 m of elevation gain over 8 km. That affects pacing, muscular load, and preparation for late-race sections.
Courses Nature des Coëvrons is classified as Flat, averaging 3.9 vertical metres per kilometre. 76% of the route is flat, 11% climbs moderately (2 to 6%) and 0% is steeper than 6%.
Yes, Courses Nature des Coëvrons is laid out as a loop: start and finish are in the same place.
Yes. The Courses Nature des Coëvrons 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.
Preparation for Courses Nature des Coëvrons should account for 8 km, 31 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
The pacing strategy for Courses Nature des Coëvrons should reflect 8 km, 31 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
Courses Nature des Coëvrons takes place on April 10, 2027.
Courses Nature des Coëvrons takes place in Mézangers, France.
Courses Nature des Coëvrons offers 3 distances — 8 km: 8 km; 20 km: 20 km; 50 km: 50 km.
Registration runs through the organiser: courses-nature-des-coevrons.fr. YOUB shows you the course, elevation profile and training plan for your preparation.