When is the 2027 Trans Aubrac?

On Saturday 17 April 2027, according to the organiser’s entry page. The Ultra starts at 6 am from Bertholène; in 2026, the race took place on Saturday 18 April.

As of 10 October 2026, the Ultra is still open (84% of places taken), the relay is full and the Mazuc, the Capuchadou and the 13 km are full with a waiting list. Bibs cannot be transferred.

Are the GPX tracks published?

Only two days before the race: the course crosses private land. Having the track on a GPS watch is part of the mandatory kit.

Trans Aubrac: 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.

Trans Aubrac 2027: date, course and training plan

108 km · 3,500 m D+Saint-Geniez-d'Olt2027 edition: 17 April 2027

The Trans Aubrac crosses the Aveyron point to point, from the Aveyron valley over the Aubrac plateaus to the Lot valley, with every race finishing in Saint-Geniez-d’Olt. Organised by the Action 12 association, it bills itself as the first ultra-trail of more than 100 km in the département. The Ultra starts from Bertholène at 6 am; the Trail du Mazuc and the Trail du Capuchadou start from Laguiole. Next edition on Saturday 17 April 2027.

Your plan for Trans Aubrac

23 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.

Trans Aubrac at a glance

Date: 2027 edition: 17 April 2027
Formats: Ultra Trans AubracPlan below — 108 km and 3,500 m of climbing according to the 2026 rules and the 2027 entry page (the home page says 107.5 km and 3,400 m). 6 am start from Bertholène, finish in Saint-Geniez-d’Olt. 500 bibs.
Trans Aubrac en relais par 4 — The Ultra course in four legs: Bertholène – Saint-Côme-d’Olt (23 km), Saint-Côme – Laguiole (31.5 km, 1,530 m of climbing), Laguiole – Aubrac (23 km), Aubrac – Saint-Geniez-d’Olt (30.5 km). 325 teams for 2027.
Trail du Mazuc — 75 km and 2,200 m of climbing according to the 2026 rules (77 km and 2,300 m on the home page). 9:30 am start from Laguiole, via Saint-Chély-d’Aubrac and the Truques d’Aubrac (1,427 m). 400 bibs.
Trail du Capuchadou — 52.5 km and 1,300 m of climbing according to the home page (53.5 km on the 2027 entry page), crossing the Aubrac from Laguiole to Saint-Geniez-d’Olt. 9:30 am start.
Trail d'Olt et d'Aubrac et randonnée — A 13 km trail race with 525 m of climbing and a 7 km hike, both looping from Saint-Geniez-d’Olt at 11 am.
Registration: Online on the Action 12 platform, linked from the official website; no on-the-day entries for the Ultra, the Mazuc, the Capuchadou or the relay. French Athletics Federation licence (Athlé Compétition, Entreprise or Running) or the PPS health course. Bibs cannot be transferred, and only a cancellation guarantee taken out at registration allows a refund. As of 10 October 2026, the 2027 page shows the Mazuc, the Capuchadou and the 13 km full with a waiting list, the relay full (325 teams) and the Ultra still open.
Official website: trans-aubrac.fr

The 2026 course

Start in Bertholène, in the Aveyron valley, at 6 am. The course reaches the Lot valley at Saint-Côme-d’Olt (km 23.3, first aid station), passes Bonneval Abbey and the La Vitarelle water point (km 43), then climbs onto the Aubrac to Laguiole (km 55). It then crosses the plateau via La Paouade to the Buron des Bouals at Aubrac (km 78), before dropping down via the Lacessat waterfall (km 90) and Saint-Martin-de-Montbon (km 100) to the finish in Saint-Geniez-d’Olt. Tracks, trails and paths, with less than 5% tarmac, and two Natura 2000 areas.

What the race asks of your training

More descent than climbing

3,500 m of climbing and 3,700 m of descent: you start in the Aveyron valley, climb onto the Aubrac via Laguiole, then drop down to the Lot valley. Long hilly runs, hill sessions and repeated controlled descents prepare your quads for the final 30 km, mostly downhill.

Cut-offs all day long

In 2026, you had to leave Saint-Côme-d’Olt (km 23.3) before 9:50 am, Laguiole (km 55) before 4:30 pm, the Buron des Bouals (km 78) before 9 pm, the Lacessat waterfall (km 90) before 11 pm and Saint-Martin-de-Montbon (km 100) before 1 am. The first one, 3 h 50 after the start, means setting off at an easy aerobic pace without hanging about.

Long legs in semi-self-sufficiency

Full aid stations at Saint-Côme-d’Olt, Laguiole, Aubrac (Buron des Bouals) and the finish, a single water point in between at La Vitarelle (km 43), and no cups: a reusable cup is mandatory. The rules stress that there is no water in the middle of the legs. Train with a loaded pack, test your drink and food on long runs and get used to drinking on the move.

The Aubrac in April

On the Aubrac plateau, the rules anticipate fog, heavy rain, cold and snow: warm kit (waterproof hooded jacket, second layer, long tights, hat, gloves) can be made mandatory, announced three days before. The last runners finish in the dark, by headtorch. A few long runs in bad weather with that kit beat discovering it on race day.

The plan below prepares the Ultra Trans Aubrac format, for an athlete at intermediate level with 4 days available per week, with race day on 17 April 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	6.3 h	42	1,004 m
2	General preparation	6.6 h	45	1,146 m
3	Baserecovery	5.1 h	36	675 m
4	Base	6.6 h	46	1,047 m
5	Base	7 h	47	1,075 m
6	Base	7.3 h	50	1,219 m
7	Baserecovery	5.7 h	39	813 m
8	Base	7.3 h	49	1,270 m
9	Base	7.8 h	53	1,281 m
10	Base	8.1 h	54	1,465 m
11	Buildrecovery	6.3 h	42	986 m
12	Build	8.2 h	54	1,638 m
13	Build	8.9 h	58	1,655 m
14	Build	8.9 h	59	1,781 m
15	Buildrecovery	7 h	47	1,214 m
16	Build	9.3 h	60	1,899 m
17	Specific	9.7 h	63	2,002 m
18	Specific	9.9 h	63	2,090 m
19	Specificrecovery	7.7 h	54	1,266 m
20	Specific	10.2 h	66	2,197 m
21	Specific	10.6 h	65	2,260 m
22	Specific	10.9 h	69	2,358 m
23	Taper	6.9 h	47	1,228 m
24	Taper	5.4 h	39	408 m
25	Race week	3.6 h	30	67 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 · 33 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 2358 m, for 3500 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 Trans Aubrac