When is the 2027 Transju'Trails?

On 5 and 6 June 2027. The 110 km Ultra, the 82 km, the 65 km, the 25 km and the 5 km are on Saturday 5 June; the 42 km, the 15 km, the 10 km and the hike on Sunday 6 June.

When does registration open for the 2027 Transju'Trails?

It has been open since 8 October 2026, online. Prices rise in steps: for the Ultra, €120 until 29 March 2027, then €144, €156 and €180 in the final week, while the 500 places last.

Where and when does the 110 km Ultra start?

From the Oppidum in Champagnole, on Saturday 5 June 2027 at 12:01 am, finishing in the heart of Les Rousses village. Bibs are collected the day before in Les Rousses, from 2 pm to 8 pm, or at the start from 10:30 pm; an optional shuttle runs from Les Rousses to Champagnole.

Do you need ITRA points for the 110 km Ultra?

No: you need 75 points calculated by the organisers (1 point per km, 1 point per 100 m of climbing) on a single race finished between 1 January 2024 and 10 May 2027. A 50 km trail race with 2,500 m of climbing, for example, is enough. Each Transju'Trails race, on the other hand, awards ITRA points and a UTMB Index rating.

La Transju'Trails (Jura): how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 25-week preparation. If your race is closer, the plan compresses phases while keeping the taper; if it's further away, it lengthens the preparation, and when the gap is large the preparation starts right away, gently and at your current volume, before building up.

How many sessions per week?

This example has 4 sessions per week. You choose 4 to 7 training days and the exact days (e.g. Tue, Thu, Sat, Sun): the plan sticks to them.

I'm a beginner, is this plan for me?

The plan adapts to your declared level (beginner to semi-pro): starting volume, progression and intensity change. Endu also offers a "Discovery" mode without a race to build a base first.

Can I follow sessions on my watch?

Yes, on Garmin and COROS. On Garmin, the Endu app (Connect IQ Store) shows today’s session and starts it as a guided workout. On COROS, link your account from your profile: your running, trail and cycling sessions land in the watch calendar. Other brands are not supported yet.

How much does it cost?

14-day free trial, then €7.99/month with no commitment or €59.88/year (€4.99/month). Unlimited objectives and sports.

La Transju'Trails (Jura) 2027: date, course and training plan

110 km · 4,200 m D+Champagnole → Les Rousses2027 edition: 5 June 2027

The Transju'Trails brings together around ten races in the Jura mountains, around Les Rousses, on the first weekend of June. The longest, the 110 km Ultra, starts in Champagnole at midnight and reaches Les Rousses after 109 km and 4,200 m of climbing, via the sinks of the Ain, the Langouette gorges, Chaux-Neuve and the Combe des Cives. The 2027 edition takes place on 5 and 6 June, when the Transju'Trails celebrates its 20th anniversary.

Your plan for La Transju'Trails (Jura)

30 weeks to go: your plan starts this week, set to your level and free days, then adapts to your feedback after each session.

Your level?

14-day trial, cancel anytime.

La Transju'Trails (Jura) at a glance

Date: 2027 edition: 5 June 2027
Formats: Ultra 110 kmPlan below — 109 km and 4,200 m of climbing according to the 2027 rules. Start in Champagnole on Saturday 5 June 2027 at 12:01 am, finish in Les Rousses. Time limit: 22 hours to complete the course. 500 bibs. Life base at Chaux-Neuve (km 55). From €120 (until 29 March 2027) to €180 (final week).
Trail 82 km — 82 km and 3,500 m of climbing, a loop from Les Rousses, on Saturday 5 June at 5 am, including the climb up La Dôle. 600 bibs, €90 to €135. Also run as a relay for 2 to 4 runners (130 teams, €130 to €195 per team).
Trail 65 km — 66 km and 2,750 m of climbing according to the rules, a loop from Les Rousses, on Saturday at 7 am. 600 bibs, €70 to €105.
Trail 42 km — 42 km and 2,150 m of climbing, from Morbier to Les Rousses, on Sunday 6 June at 7 am. 1,500 bibs, €55 to €75.
Trail 25 km — 25 km and 1,250 m of climbing, a loop from Les Rousses, on Saturday at 8 am. 1,500 bibs, €35 to €48. A 25 km + 42 km combo is available.
Trails 15, 10 et 5 km, randonnée — 15 km trail (17 km and 870 m of climbing, from Les Tuffes to Les Rousses, Sunday at 10:30 am), 10 km trail (Sunday at 11 am), 5 km trail (Saturday at 7:30 pm), a 15 km hike on Sunday and a youth race on Saturday.
Registration: Registration for 2027 has been open since 8 October 2026, online only. The Ultra price rises in steps: €120 until 29 March 2027, €144 until 26 April, €156 until 29 May, then €180 from 30 May to 5 June if places remain; group rates from 10 entrants. For the Ultra, you must show 75 points from a single running race finished between 1 January 2024 and 10 May 2027 (1 point per km and 1 point per 100 m of climbing). You also need a French Athletics Federation (FFA) licence (competition, company, running or Pass J'aime courir) or the PPS health certificate. When a race is full, a waiting list opens and a draw picks 50 people from it, 15 days later.
Official website: latransju.com/evenements/la-transju-trail/epreuves/ultra-110-km

The 2027 course

Start in Champagnole at 12:01 am. According to the organisers’ description, the course first follows the water, from the sinks of the Ain to the Langouette gorges, then passes through Foncine-le-Haut and Chaux-Neuve, with the ski-jump climb and the life base (km 55). It then crosses the Combe des Cives, a landmark of the Transjurassienne ski race, joins the other races at Chapelle-des-Bois, and continues via Morbier and Prémanon to the finish in the heart of Les Rousses village. The first part of the 2027 course is being modified: the exact route has not been published yet.

What the race asks of your training

A whole night from the start

The Ultra leaves Champagnole at 12:01 am: the first part, from the sinks of the Ain to the Langouette gorges, is run by headtorch, and a light is part of the mandatory kit. A few long runs started in the middle of the night teach you to run trails with little visibility and to keep eating despite wanting to sleep.

22 hours for 109 km

The time limit is 22 hours, a little under 5 km/h on average, and the organisers warn that a runner with a UTMB Index below 400 has very little chance of finishing. With less than 40 m of climbing per kilometre, the Ultra involves far more running than an Alpine ultra: you need to hold an easy endurance pace for a long time, without walking everything.

Forest singletrack and the ski-jump climb

The organisers describe technical sections, forest singletrack and the climb up the Chaux-Neuve ski jump, before the life base (km 55). Practise descending on technical trails, and short, steep hills at the end of long runs, when your legs are already tired.

An early-June race

For a race on 5 June, race-specific training falls in April and May. Think about qualification too: without a 75-point race since 2024, plan an intermediate trail race before 10 May 2027. The rules require a water reserve, a survival blanket, a hooded waterproof jacket, a charged phone, a cup and a light: do your long runs with that pack loaded.

The plan below prepares the Ultra 110 km format, for an athlete at intermediate level with 4 days available per week, with race day on 5 June 2027. Aiming for another format? Enter its distance when you create your plan, which will be calibrated on your level, your available days and your feedback after every session.

weeks: 25
sessions: 100
sessions / week: 4
peak week: 10.9 h

Plan structure

Periodised in phases: build the base, move to race-specific work, then taper before the race.

General preparation
Weeks 1–2 · 2 wk
Base
Weeks 3–10 · 8 wk
Build
Weeks 11–16 · 6 wk
Specific
Weeks 17–22 · 6 wk
Taper
Weeks 23–24 · 2 wk
Race week
Weeks 25–25 · 1 wk

Volume progression

Week by week: lighter recovery weeks are built in to absorb the load.

Wk	Phase	Hours	km	Elev.
1	General preparation	6.4 h	43	1,103 m
2	General preparation	6.6 h	45	1,275 m
3	Baserecovery	5.1 h	36	740 m
4	Base	6.6 h	44	1,164 m
5	Base	7 h	47	1,230 m
6	Base	7.3 h	49	1,351 m
7	Baserecovery	5.7 h	39	896 m
8	Base	7.3 h	49	1,415 m
9	Base	7.8 h	53	1,471 m
10	Base	8.1 h	54	1,623 m
11	Buildrecovery	6.3 h	42	1,085 m
12	Build	8.2 h	51	1,787 m
13	Build	8.9 h	57	1,909 m
14	Build	8.9 h	56	1,946 m
15	Buildrecovery	7 h	47	1,344 m
16	Build	9.3 h	60	2,132 m
17	Specific	9.7 h	62	2,234 m
18	Specific	9.9 h	60	2,268 m
19	Specificrecovery	7.7 h	54	1,416 m
20	Specific	10.2 h	62	2,446 m
21	Specific	10.6 h	65	2,458 m
22	Specific	10.9 h	66	2,634 m
23	Taper	6.9 h	45	1,434 m
24	Taper	5.4 h	39	478 m
25	Race week	3.6 h	30	78 m

Sample week — week 14 (Build)

Real sessions from the plan with their targets. Each session is detailed step by step, and can be sent to a Garmin or COROS watch.

TuesdayModerate
3 × (8 min climb + 4 min descent)
51 min · 6 km
FridayEasy
56 min easy
56 min · 7.5 km
SaturdayEasy
Back-to-back long run
2 h 04 · 12 km
SundayEasy
Long run 5 h 03
5 h 03 · 30 km

Example generated for a intermediate-level profile (MAS 15 km/h, 4 days available per week). Your plan will depend on your level, availability and feedback.

This plan’s check-up

Pass

A 25-week build (recommended minimum: 20); a longest run never more than 10% above the previous month’s; volume rising at most 8% from one week to the next; 96% of the time at easy effort; the longest session 3 weeks before the race; a taper cutting volume by 67% in race week.

2 worth knowing · 16 checks passed

Remarks

Strength training — No strength session.
Fueling — Long sessions (up to 360 min in this plan) are where race fueling is rehearsed.

The 16 checks passed, in detail

Length of the build — 25 weeks: enough for this race (recommended minimum: 20).
Sessions per week — 4 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises at most 8% from one week to the next (a signal appears beyond 20%).
Long run increase — Each week, the longest run is at most 10% longer than the longest of the previous month (benchmark: 10%).
Lighter weeks — A lighter week comes back regularly (weeks 3, 7, 11, 15, 19, 23).
Intensity distribution — About 96% of the time at easy effort: the most common distribution among trained endurance athletes.
Demanding sessions — No more than 2 demanding session(s) a week: suited to the level.
Hard days back to back — Demanding sessions are separated by easy days.
Rest days — At least one rest day a week.
Climbing in training — The plan prepares the climbs and descents (32 sessions with elevation).
Timing of the longest session — The longest session falls 3 weeks before the race: the right time.
Taper — Volume drops 67% in race week.
Intensity during the taper — Short race-pace efforts remain in the last two weeks.
Frequency during the taper — The number of sessions stays close to usual (100%).
Climbing in the busiest week — The busiest week climbs 2634 m, for 4200 m on race day.
Back-to-back long runs — The plan has back-to-back long runs (9 weekends).

Endu runs its own plans through the plan check open to everyone: same public rules, same thresholds, same sources. The rules and their sources, and a check of your own plan.

Why this plan works

Science-based periodisation

Base → build → specific → taper, with a recovery week every 3 to 4 weeks. Load goes up, but never two hard weeks in a row without a breather.

Paces, not vague feelings

Every session has target zones (pace, HR) computed from your MAS or a reference performance. A MAS test is built into the plan if you don't know yours.

Elevation as the central variable

Weekly climbing volume, long hilly runs, downhill technique and power-hiking for ultras: a trail plan is not a road plan with bumps.

A plan that listens

After each session you rate how it felt (RPE). Too hard? The plan eases what follows. Skipped a session? It reschedules or absorbs it.

On your watch

On Garmin with the Endu app, on COROS by direct sync: the guided workout shows up on your wrist, step by step.

Reviews

What our users say.

4.8/5

“I took Endu to prepare a trail race with friends. I really like having my week already organised: it motivates me and I enjoy my runs more.”
Émilie · Trail
“What I like is no longer asking myself a thousand questions before going for a run. I follow the plan and I enjoy training.”
Nicolas · Trail
“With work and the kids, I thought I’d struggle to follow a plan. In the end, having a structure helps me a lot. Running has found a real place in my week again, and it feels good!”
Julie · Trail
“I used to spend more time looking for a plan than following one. Now I have my sessions, I know what to do and I stick to it. Really glad I tried it.”
Thomas · Running
“Training for my first half marathon and honestly, I’m getting into it! I even look at my next sessions ahead of time, when before I was mostly looking for an excuse not to go out 😂”
Camille · Running
“Simple to follow and really handy with the watch. I start my session and off I go.”
Julien · Running
“A good find to prepare my swimrun! It’s nice to find a plan for this sport. I’ve recommended it to my teammate.”
Antoine · Swimrun
“I run more regularly and, above all, with more desire. For that alone, I’m delighted.”
Laura · Swimrun
“For triathlon, having all three sports in the same schedule really makes my life easier. I spend less time organising my training and I still enjoy following it just as much.”
Maxime · Triathlon
“At first I just wanted to try it. Now checking the next day’s session has become my little evening ritual 😊”
Sarah · Triathlon

Your plan, not a template athlete's

This plan is generated for an athlete at intermediate level with 4 days available per week. Yours will be calibrated on your MAS, your available days and your feedback after every session. 3 minutes. 14-day trial, cancel anytime.

Create my plan for La Transju'Trails (Jura)