When is the 2027 Lac de Vassivière swimrun?

The organisers announce June 2027, with no exact date yet. The 2026 edition took place on 20 and 21 June, with the Half starting on Sunday 21 June at 8:30 am on the island of Vassivière.

Yes on the Experience and the Sprint, which are raced solo or in pairs; the Night is pairs only. For the Classic and the Half, the page does not say yet: check when registration opens.

Pull buoy, paddles, neoprene hood and gloves, tether and safety buoy. Mandatory: the bib and swim cap provided, goggles, a whistle without a pea, a foil blanket, and a wetsuit if the water is below 16 °C. Banned: fins, snorkels, buoyancy aids over 100 × 30 cm, and wetsuits above 22 °C.

Swimrun Lac de Vassivière: how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 19-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 5 sessions per week. You choose 5 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.

Swimrun Lac de Vassivière 2027: date, course and training plan

37.5 km · 527 m D+ · 6.9 km swim · 30.6 km runBeaumont-du-Lac2027 edition: date not announced yet

The SWIMRUNMAN Lac de Vassivière takes place in June on this large Limousin lake of over 1,000 hectares, between Haute-Vienne and Creuse, starting from the island of Vassivière. The Half, the longest format, covers 37.5 km including 6.9 km of swimming and crosses five islands, heather moorland, floating bridges and boardwalks on stilts. The same weekend offers shorter formats, a night race in pairs and children’s races.

Your plan for Swimrun Lac de Vassivière

A plan set to your level and free days, which adapts to your feedback after each session.

Your level?

14-day trial, cancel anytime.

Swimrun Lac de Vassivière at a glance

Date: 2027 edition: date not announced yet2026 edition: 21 June 2026
Formats: Experience — 8.3 km (1.6 km swim, 6.7 km run), 213 m of climbing, 4 swims and 5 runs on a loop around the island, every swim along the shore. Solo or in pairs.
Sprint — 13.65 km (2.5 km swim, 11.15 km run), 128 m of climbing, 6 swims and 7 runs. Solo or in pairs, no cut-offs.
Classic — 23.2 km (4.3 km swim, 18.9 km run), 297 m of climbing, 9 swims and 10 runs, 9:30 am start in 2026. The most popular distance on the circuit, according to the organisers.
HalfPlan below — 37.5 km (6.9 km swim, 30.6 km run), 527 m of climbing, 13 swims and 14 runs according to the format page, three aid stations. 8:30 am start in 2026.
Night et Night & Day — 13.2 km (3.2 km swim, 10 km run) at night, in pairs, on a loop done twice: head torch on the runs, a lit buoy provided and a tether mandatory on the swims. Saturday 10 pm start in 2026; the Night & Day races again on Sunday at 10 am.
Kids — Children’s races on the Saturday, from 0.7 to 2.7 km depending on age.
Registration: Registration for 2027 is not open yet: every format is marked “coming soon”. Entries are online only, on the official site, solo or as a team of two depending on the format, while places last. You must be 18 on race day; athletes without a licence no longer need a medical certificate but fill in an online health questionnaire. No 2027 prices are published yet.
Official website: swimrunman.fr/courses/lac-de-vassivi%C3%A8re

The 2026 course

Start on the island of Vassivière. The Half crosses five islands, dry heather moorland, floating bridges, peat bogs and boardwalks on stilts. According to the course sheet updated in January 2026, the aid stations are at km 11 (Bois & Nature), km 17 (Broussas) and km 26 (car park), and the longest run section, over 8 km, comes near the end.

What the race asks of your training

Warm water, sometimes without a wetsuit

The organisers expect water between 20 and 24 °C, and wetsuits are banned above 22 °C. So train to swim without one too, in your shoes, with paddles and a pull buoy: without the buoyancy of neoprene, your legs drag more.

A lot of transitions

13 swims and 14 run sections on the Half, some of them only 100 m long according to the course sheet. Time is won getting in and out of the water: sessions that link swimming and running without stopping, with your race-day kit, are the most useful.

A long but rolling run

About 500 m of climbing over 30.6 km of running, on trails, moorland and boardwalks: a rolling profile, far from mountain terrain. Long easy runs on paths matter more than hill work, with a section of more than 8 km near the end.

Generous cut-offs

Apart from the Sprint, the organisers set cut-offs based on roughly 8 min/km running and 3:30 per 100 m swimming, published before the race. The Half takes between 4h and 7h10 according to their estimates.

The plan below prepares the Half format, for an athlete at intermediate level with 5 days available per week. Until the official date is out, the example is set for 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: 19
sessions: 94
sessions / week: 5
peak week: 8.2 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 3–8 · 6 wk
Build
Weeks 9–12 · 4 wk
Specific
Weeks 13–16 · 4 wk
Taper
Weeks 17–18 · 2 wk
Race week
Weeks 19–19 · 1 wk

Volume progression

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

Wk	Phase	Hours	km
1	General preparation	4.8 h	38
2	General preparation	5 h	40
3	Base	5.3 h	33
4	Base	5.5 h	35
5	Baserecovery	4.3 h	25
6	Base	6 h	36
7	Base	6.1 h	37
8	Base	6.2 h	38
9	Buildrecovery	5.1 h	32
10	Build	6.6 h	41
11	Build	6.8 h	43
12	Build	7.4 h	44
13	Specificrecovery	5.7 h	11
14	Specific	7.6 h	14
15	Specific	7.9 h	16
16	Specific	8.2 h	18
17	Taper	5.6 h	37
18	Taper	4.6 h	29
19	Race week	2.4 h	19

Sample week — week 10 (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.

TuesdayBrickModerate
3 × (8 min swim + 12 min run)
1 h 15
WednesdaySwimmingEasy
3 × 10 min steady
1 min recovery
51 min · 2.3 km
ThursdaySwimmingHard
15 × 100 m at threshold
15 s recovery
50 min · 2.3 km
FridayRunningVery hard
3 × 1.2 km at MAS
2 min 30 s jog recovery
48 min · 8.8 km
SundayRunningEasy
Long run 2 h 53
2 h 53 · 27.9 km

Example generated for a intermediate-level profile (MAS 15 km/h, 5 days available per week). Your plan will depend on your level, availability and feedback.

This plan’s check-up

Pass

A 19-week build (recommended minimum: 12); a longest run never more than 6% above the previous month’s; volume rising at most 7% from one week to the next; 92% of the time at easy effort; the longest session 3 weeks before the race; a taper cutting volume by 71% in race week.

2 worth knowing · 19 checks passed

Remarks

Strength training — No strength session.
Fueling — Long sessions (up to 210 min in this plan) are where race fueling is rehearsed.

The 19 checks passed, in detail

Length of the build — 19 weeks: enough for this race (recommended minimum: 12).
Sessions per week — 5 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises at most 7% from one week to the next (a signal appears beyond 20%).
Long run increase — Each week, the longest run is at most 6% longer than the longest of the previous month (benchmark: 10%).
Lighter weeks — A lighter week comes back regularly (weeks 5, 9, 13, 17).
Intensity distribution — About 92% of the time at easy effort: the most common distribution among trained endurance athletes.
Demanding sessions — No more than 3 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.
Timing of the longest session — The longest session falls 3 weeks before the race: the right time.
Swim-run sessions — 12 sessions alternating swimming and running over the last 8 weeks.
Taper — Volume drops 71% 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 (90%).
Share of swimming — Swimming is 35% of swim + run time: within benchmarks (25 to 40%).
Swimming every week — 3 swim sessions a week.
Swimming in race kit — 19 swims with shoes on over the last 8 weeks.
Open water — 8 open-water session(s) before the race.
Longest swim-run session — The longest swim-run session lasts 210 min, for a race of about 339 min.

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.

Transitions and gear

Swim / run transition sessions with paddles and pull-buoy, so your body gets used to switching effort and running wet.

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

“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
“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
“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
“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 5 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 Swimrun Lac de Vassivière