
The Trail de Foncine is the shortest loop of the Val Foncine Trail, but no sprint: over about 10.8 km in the Jura around Foncine-le-Haut, nearly 200 metres separate the start from the high point. Your race depends on how quickly you recover from the steep ramp at kilometre 4, and how much nerve you have left for the way down.
The loop starts at just over 870 metres and gives you time at first. After a short opening, the trail rises steadily for about a kilometre and a half from kilometre 1.3, at a grade you can still run comfortably. At kilometre 3.75 that changes: for a little over half a kilometre it climbs at eleven percent on average, with single spots twice as steep.
What follows on top defines the loop. For almost four kilometres the course stays above 1,000 metres, rolling over three short counter-climbs to just over 1,060 metres without ever letting you coast. Only shortly before kilometre 8 does it tip over: nearly 90 metres drop away in about 550 metres, a short shelf follows, the descent continues to kilometre 10, and the last stretch runs almost flat back to the start.
The setting is the Val Foncine in the Jura, the course a loop on varied trails around Foncine-le-Haut. The ten is not only a race of its own: together with the Tour du Val Foncine it forms the Challenge, two separate races across one weekend.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 0.7 | 0.5 km | 4.5 % | 11.8 % | +22 m | — |
| km 1.3 | 1.5 km | 4.6 % | 10.6 % | +70 m | — |
| km 3.8 | 0.6 km | 11.2 % | 22.2 % | +64 m | — |
| km 5 | 0.4 km | 7.7 % | 10.8 % | +27 m | — |
| km 5.6 | 0.6 km | 5.8 % | 10.7 % | +36 m | — |
| km 6.7 | 0.6 km | 5.4 % | 10.1 % | +29 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.
Divide this race by direction, not by kilometres. You collect most of the climbing by kilometre 6 and hand it back faster from kilometre 8 on. So run the long first climb deliberately below your comfort limit: it is gentle enough to tempt you into a pace you will miss on the ramp at kilometre 3.75.
The ramp itself wins nothing, it can only cost you. Hike the steepest metres briskly instead of forcing them. The race is decided on the rolling kilometres after it: if you settle back into a smooth stride straight away and carry speed through the counter-climbs, you gain more there than the ramp could ever give you.
The trap sits beyond the high point. The first steep section down arrives on tired legs, and running it tensed up leaves nothing for the rest. Expect close to eleven kilometres rather than ten as well: the flat finish comes later than the name of the race suggests. Challenge starters should hold back here, because the 26 km is still to come.

Expect about 1:05 to 1:40 hours. That is short enough to stay near the top of your aerobic range almost throughout, but the effort is never even: the steady climb, the hard ramp, the rolling high ground and the descent each ask for something different, and more than a quarter of the course runs steeply up or down.
The key is recovering while running. Build in hill intervals of three to four minutes on genuinely steep ground, then keep going for several minutes at a controlled, brisk pace over rolling terrain instead of stopping for the rest. That transition decides the stretch between kilometres 4 and 8, and ordinary hill sprints do not train it.
Downhill running matters just as much. Nearly 90 metres of descent in barely more than half a kilometre goes straight into the quads, so put steep descents at the end of longer runs, when your legs are already tired. Practise them on mixed ground, because that is what the trails around Foncine-le-Haut offer.
With the race in May, your hill block falls in March and April. If you are planning the Challenge, run on two consecutive days several times in that period: a short, hilly tempo effort on the first day, then a long session on legs that are already loaded on the second.

Download the Val Foncine Trail 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.
Val Foncine Trail is 10 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
Val Foncine Trail has around 304 m of elevation gain over 10 km. That affects pacing, muscular load, and preparation for late-race sections.
Val Foncine Trail is classified as Hilly, averaging 28.2 vertical metres per kilometre. 13% of the route is flat, 32% climbs moderately (2 to 6%) and 14% is steeper than 6%.
The hardest climb of Val Foncine Trail starts at kilometre 1.3, runs for 1.5 km at an average of 4.6% and gains 70 metres. 6 climbs are mapped in total.
Yes, Val Foncine Trail is laid out as a loop: start and finish are in the same place.
Yes. The Val Foncine Trail 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 Val Foncine Trail should account for 10 km, 304 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 Val Foncine Trail should reflect 10 km, 304 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
Val Foncine Trail takes place on May 22, 2027.
Val Foncine Trail takes place in Foncine-le-Haut, France.
Val Foncine Trail offers 4 distances — Trail de Foncine 10 km: 10 km; Duo des Foncines 15 km: 15 km; Tour du Val Foncine 26 km: 26 km; Challenge 10k–26k: 36 km.
Registration runs through the organiser: val-foncine-trail.fr. YOUB shows you the course, elevation profile and training plan for your preparation.