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Ultra Marin Golfe du Morbihan
Photo: Jebulon / Wikimedia Commons (CC BY-SA 4.0) (opens in a new tab) / Source (opens in a new tab)

Vannes

Ultra Marin Golfe du Morbihan

Friday, 25 June 2027

Grand Raid 175K

175km ≈D+ 1900m

Raid 100K

100km ≈D+ 1100m

Réveil des Ducs 70K

70km ≈D+ 800m

L'Arvor 56K

56km ≈D+ 650m

Ronde des Douaniers 34K

34km ≈D+ 400m

See the gear
Ultra Marin Golfe du Morbihan 2027 registration: dates not announced yetSee recommended gear

Your checklist for Ultra Marin Golfe du Morbihan

What you need, category by category, with our #1 pick for this race. Tick what you already have.

0 of 6 ready

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  1. GPS watch

    Garmin Instinct 3 Solar 45 mm

    Solar charging: up to 28 days of battery

    Downside: No onboard topo maps

    View on Amazon →(opens in a new tab)

  2. Gear

    Shoe with grip on wet rock, not just cushioning

    Hoka Speedgoat 7

    Max Hoka cushioning: protects your legs over long distances

    Downside: High stack: less stable for those who want more ground feel

    View on Amazon →(opens in a new tab)
    See 7 alternatives Which shoe suits you best? Shoe finder

  3. Nutrition

    Set an intake every 45 minutes even without hunger

    Maurten Gel 100

    Hydrogel technology: excellent gastric tolerance

    Downside: High price compared to other gels

    View on Amazon →(opens in a new tab)
    See 7 alternatives

  4. Sun Protection

    Sweat-resistant SPF50 cream, reapply at aid stations

    ISDIN Fusion Water Sunscreen SPF 50+

    Ultralight texture, feels invisible on skin

    Downside: Small format (50 ml), may run short on ultras

    View on Amazon →(opens in a new tab)
    See 7 alternatives

  5. Body Care

    Anti-chafe balm on armpits, thighs and feet

    Julbo Aerospeed

    Photochromic lenses: adapt from forest to summits

    Downside: Higher price compared to non-photochromic glasses

    View on Amazon →(opens in a new tab)
    See 7 alternatives

  6. Car Rental

    Book in advance and check the mileage policy

    DRIVALIA CarCloud Country Plus

    View on Amazon →(opens in a new tab)
    See 3 alternatives

  7. Trip logistics

    Registration, travel and insurance: what you should have sorted before race day.

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Race data

Terrain

Ultra Trail

Difficulty

Advanced

Distance

5 modalities

Visit official website(opens in a new tab)

  • Grand Raid 175K

    Distance
    175 km
    Elevation Gain
    ≈D+ 1900m
    Max Time
    -

  • Raid 100K

    Distance
    100 km
    Elevation Gain
    ≈D+ 1100m
    Max Time
    -

  • Réveil des Ducs 70K

    Distance
    70 km
    Elevation Gain
    ≈D+ 800m
    Max Time
    -

  • L'Arvor 56K

    Distance
    56 km
    Elevation Gain
    ≈D+ 650m
    Max Time
    -

  • Ronde des Douaniers 34K

    Distance
    34 km
    Elevation Gain
    ≈D+ 400m
    Max Time
    -
Will your watch battery last the ~31 h of Ultra Marin Golfe du Morbihan?Worked out for the longest course (175 km). See which watches reach the finish with GPS on and which die on the way.Check my watch

Gear up for Ultra Marin Golfe du Morbihan

Buying guides with the best value for money, picked for this kind of terrain.

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What the Ultra Marin is

The Ultra Marin is Brittany’s biggest trail event and one of France’s most crowded long-distance races: 10,000 runners across all distances, with the 175 km Grand Raid as the flagship. The route circles the entire Gulf of Morbihan, starts and finishes at Vannes harbour and includes a boat crossing between Locmariaquer and Arzon. It looks like a coastal stroll and ends up being a lesson in patience.

An ultra without mountains

There are no mountain passes here: total ascent is around 1,900 m over 175 km. The wear comes from elsewhere: sand in your shoe, wet rock on the coast, narrow customs paths, constant Atlantic wind and a 42-hour cut-off that invites you to start too fast. The winner is whoever walks the last 40 km well.

The tide rules

The gulf has one of Europe’s strongest tides in its class and the route is conditioned by it. That means water sections, passages that close and logistics the organiser adjusts every year. This is not a detail: it is why this race looks like no other.

Planning the trip

Vannes is a small, handsome city with a harbour, walls and oyster restaurants. Arrive on Thursday, collect your bib without rushing and spend Friday resting. To combine the race with tourism, check the regional race calendar and sort accommodation and logistics with the planner.

360Complete Pack

Entry to the Ultra Marin

Registration

An event capped at 10,000 places to protect the gulf trails. Each distance has its own quota and some sell out within hours.

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Tips

  • •The Grand Raid quota goes first: note the opening date
  • •You can run the 175 km solo or in teams of four
  • •Check the medical certificate: it is mandatory for trail in France
  • •Bib collection requires the documents in hand, no exceptions

Where to sleep for the Ultra Marin

Accommodation

The gulf is a holiday destination in June: rooms fill up and prices rise. Book in Vannes if you want to walk to the start and the finish.

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Tips

  • •Vannes centre or harbour: the most convenient for start and finish
  • •Gulf islands (Île aux Moines, Île d'Arz): unique experience, book very early
  • •Sarzeau and Arzon: close to the 100K start and cheaper
  • •Cottages and campsites on the south shore as plan B

Gear for a full lap of the gulf

Gear

The challenge is not cold or altitude, it is time on your feet. There is sand, wet rock and customs path, and the Atlantic wind never stops.

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Tips

  • •Shoe with grip on wet rock, not just cushioning
  • •Technical socks and a mid-race change: sand gets everywhere
  • •A real waterproof: Brittany in June can rain at 15 degrees
  • •Mandatory head torch at night and spare battery for 42 hours
Hoka Speedgoat 7

Which shoes for Ultra Marin Golfe du Morbihan?

Which footwear fits based on the race's terrain and weather

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Garmin Instinct 3 Solar 45 mm

Which GPS watch for Ultra Marin Golfe du Morbihan?

Which watch has the battery to last based on your estimated finish time

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Best Trail Running Hydration Vests 2026: Comparison and Buying Guide

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Eating through 175 km of coast

Nutrition

With no climbing, the risk is under-eating because you never feel hungry. Breton aid stations are generous and savoury, with soup and potatoes, and you must use them.

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Tips

  • •Set an intake every 45 minutes even without hunger
  • •Soup and potatoes at night stations work wonders
  • •Electrolytes: wind and humidity make you sweat more than you think
  • •Carry your own food for the Arzon to Locmariaquer stretch
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Best salt tablets and sodium capsules for running 2026

A comparison of the 7 best salt tablets and sodium capsules for running and trail 2026: 226ERS Sub9 Salts, Crown Pro Salt Caps, Victory Endurance, Precision Hydration PH 1500 and more. How many salt tablets to take per hour, how to calculate your sweat rate and which format to choose.

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Getting to Vannes

Transport

Vannes has a TGV station with direct trains from Paris in just over two hours. Rennes airport is an hour away and Nantes about ninety minutes.

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Tips

  • •Paris-Vannes TGV is the easiest option, book months ahead
  • •The boat crossing between Locmariaquer and Arzon is part of the race
  • •Parking in Vannes: use peripheral car parks and walk to the harbour
  • •From Spain: drive, or fly to Nantes and take two hours of motorway

Car rental for Ultra Marin

Car Rental

A car makes it easier to reach the start and get around before and after the race.

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Tips

  • •Book in advance and check the mileage policy
  • •Useful if your accommodation is far from the start

Sports insurance for Ultra Marin

Insurance

Cover your participation with insurance that includes medical assistance and mountain rescue.

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Tips

  • •Check that it covers the race format and elevation gain
  • •Review rescue cover if the race is in the mountains

Sun protection for Ultra Marin

Sun Protection

Sun exposure takes its toll on long races, especially on exposed sections and at midday.

Browse all sun protection

Tips

  • •Sweat-resistant SPF50 cream, reapply at aid stations
  • •Protect lips, ears and neck
🧴

Best Sunscreen for Runners 2026: 7 Sweat-Proof SPF 50 Picks

Which sunscreen survives a sweaty long run? We compared 7 SPF 50 sweat-proof picks — creams, sticks and a lip balm — on heat, altitude UV and sweat resistance. See the winner.

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Body care for Ultra Marin

Body Care

Kilometres and descents punish feet and skin: anti-chafe balm and blister patches prevent DNFs.

Browse all body care

Tips

  • •Anti-chafe balm on armpits, thighs and feet
  • •Blister patches in your pocket

Frequently Asked Questions

When is the Ultra Marin held?
It runs on the last weekend of June. The 2027 edition is expected from 25 to 27 June (estimated date), with staggered starts from Vannes, Saint-Gildas-de-Rhuys, Sarzeau, Auray, Baden and Séné depending on the distance.
How much climbing does the 175 km Grand Raid have?
Very little for the distance: around 1,900 m of total ascent. This is not a mountain race but a test of management, feet and head, with sand and coastal path that break you more than any climb.
Do I need to book accommodation far in advance?
Yes. Vannes and the gulf islands host 10,000 runners plus companions on the best June weekend of the year. Outside Vannes, villages on the south shore such as Arradon, Sarzeau and Locmariaquer are the realistic option.

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