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Formentera Trail 21.1
Photo: Organisation Formentera Trail 21.1 (official poster) (opens in a new tab) / Source (opens in a new tab)

Formentera

Formentera Trail 21.1

Saturday, 5 June 2027

Formentera Trail 21.1K

21.1km D+ 0m

Short trail 10K

10km D+ 0m

Caminadores 10K

10km D+ 0m

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Registration open for Formentera Trail 21.1 2027Places for UTMB World Series races sell out. Secure your bib.Register now (opens in a new tab)

Your checklist for Formentera Trail 21.1

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

0 of 6 ready

Swipe to see all 7 categories

Swipe to see all 7 categories

  1. GPS watch

    Garmin Instinct 3 AMOLED 45 mm

    Onboard topo maps, unlike the Instinct 3 Solar

    Downside: Shorter battery life than the Instinct 3 Solar (no solar charging or MIP display)

    View on Amazon →(opens in a new tab)

  2. Gear

    Trail shoes with grip suited to the terrain

    Nike Ultrafly

    ZoomX foam: exceptional energy return inherited from the Vaporfly

    Downside: High price (190 EUR)

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

  3. Nutrition

    One gel or carbohydrate source every 40-45 minutes on long efforts

    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

    SPF50 sweat-resistant sunscreen

    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 underarms, 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 ahead if you travel at the weekend

    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

Trail

Difficulty

Intermediate

Distance

3 modalities

Visit official website(opens in a new tab)

  • Formentera Trail 21.1K

    Distance
    21.1 km
    Elevation Gain
    D+ 0m
    Max Time
    -

  • Short trail 10K

    Distance
    10 km
    Elevation Gain
    D+ 0m
    Max Time
    -

  • Caminadores 10K

    Distance
    10 km
    Elevation Gain
    D+ 0m
    Max Time
    -
Will your watch battery last the ~3 h of Formentera Trail 21.1?Worked out for the longest course (21.1 km). See which watches reach the finish with GPS on and which die on the way.Check my watch

Gear up for Formentera Trail 21.1

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

Swipe to see all 4 comparisons

Historical weather

What to wear at 15 °C: guide and kit →

Typical weather for the race date (10-year average)

Temperature

19°C – 21°C

Rain

13%

Wind

24 km/h

Sunshine hours

13h

Gear recommendations

Sun protection essential (13h sunshine, up to 21°C)

Formentera Trail 21.1

Formentera Trail 21.1 takes place on Saturday 5 June 2027 in Formentera (Illes Balears). According to the registration page, the listed organiser is Zitoway.

Registration is handled on RockTheSport until 3 June 2027, with fees from 14 EUR to 39 EUR.

Options

  • Formentera Trail 21.1K
  • Short trail 10K
  • Caminadores 10K

Elevation gain appears only for the options where the organisers have published it.

Start and schedule

The main start is scheduled for 9:00 according to the registration page; always confirm the start time of each option on the organisers’ website.

June in Illes Balears

On the Mediterranean side spring is usually mild and dry, with strong midday sun and abrasive, rocky limestone ground. Hydration, sun protection and a shoe with a solid rock plate are key.

Formentera beyond the race

Use the trip to discover Illes Balears and its local food. For more races nearby, see the races in the region and plan your season in the race planner.

360Complete Pack

Formentera Trail 21.1 2027 registration

Registration

Registration through RockTheSport from 20 August 2026 to 3 June 2027. Fees from 14 EUR to 39 EUR.

Browse all registration

Tips

  • •Registration closes on 3 June 2027
  • •Check the rules and minimum age for each option on the organisers' website
  • •Keep your confirmation: you will need it to collect your bib

Where to stay for Formentera Trail 21.1

Accommodation

Formentera (Illes Balears) is the start location. Eivissa is the reference city with the widest choice of accommodation.

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Tips

  • •Book ahead if the race falls on a weekend
  • •Eivissa has the largest hotel offer
  • •Ask the organisers about runner discounts at local lodgings

Gear for Formentera Trail 21.1

Gear

On the Mediterranean side spring is usually mild and dry, with strong midday sun and abrasive, rocky limestone ground. Hydration, sun protection and a shoe with a solid rock plate are key.

Hoka Speedgoat 7

Hoka

Hoka Speedgoat 7

The best-selling trail shoe in the US and an absolute ultra-trail classic. Max Hoka cushioning, a Vibram Megagrip outsole with 5 mm lugs for grip in mud and technical terrain, and a snug Matryx upper. Built to eat up kilometres without punishing your legs in long races.

View on Amazon →
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Brooks Cascadia 18

Brooks

Brooks Cascadia 18

An all-terrain trail classic: stable, protective and reliable on any ground thanks to its pivot system that adapts the foot to the terrain. Balanced cushioning for medium and long distances.

View on Amazon →
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Leki Ultratrail FX.One

Leki

Leki Ultratrail FX.One

Foldable trail running poles in 3 sections (110-130 cm). Ultralight carbon (175 g per pole), compact 38 cm folded. Speed Lock 2 locking system.

View on Amazon →
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Salomon ADV Skin 12

Salomon

Salomon ADV Skin 12

12-litre hydration vest with SensiFit system. Two 500 ml front soft flasks included. Easy-access pockets and a close, bounce-free fit.

View on Amazon →
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Salomon Soft Flask 250 ml

Salomon

Salomon Soft Flask 250 ml

Collapsible 250 ml soft flask with a high-flow valve and a wide 42 mm mouth for fast refills at aid stations. It shrinks as you drink, fits the front pocket of any vest and weighs just a few grams empty.

View on Amazon →
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Salomon Bonatti Cross Wind

Salomon

Salomon Bonatti Cross Wind

Hooded trail running wind jacket (134 g). AdvancedSkin windproof fabric with a DWR water-repellent finish and reflective details. Front button vent and packs into its own pocket. No membrane: it sheds spray and wind, not sustained rain.

View on Amazon →
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Unisex Running Visor

Genérica

Unisex Running Visor

Lightweight, breathable visor for trail running, with no closed crown for maximum head ventilation. Adjustable velcro fit, suitable for men and women.

View on Amazon →
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Browse all gear

Tips

  • •Trail shoes with grip suited to the terrain
  • •Hydration at hand: soft flasks or a vest depending on distance
  • •A light windproof in your pack or belt
Nike Ultrafly

Which shoes for Formentera Trail 21.1?

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

→
Garmin Instinct 3 AMOLED 45 mm

Which GPS watch for Formentera Trail 21.1?

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

→
🎒

Best Trail Running Hydration Vests 2026: Comparison and Buying Guide

Best trail running hydration vests 2026: 12 vests and packs compared. How many litres you need by distance, soft flasks vs reservoir, and fit.

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Strength Training Gear for Trail Running at Home 2026: Comparison and Buying Guide

Comparison of the best strength training gear for trail runners at home: dumbbells, resistance bands, kettlebell, TRX, weight bench and foam roller, with a 3-day-a-week routine.

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🛒

Best GPS Watches with Offline Maps 2026: Value Comparison

The best GPS watches with offline maps in 2026, ranked by value: Amazfit T-Rex 3, Suunto Race 2, Garmin Forerunner 570, Instinct 3 AMOLED, Coros Apex 2 Pro, Suunto Vertical 2 and Garmin Fenix 8. Maps vs breadcrumbs, the cheapest watch with maps and which to choose for your use.

→

Nutrition for Formentera Trail 21.1

Nutrition

With 21.1K as the longest distance, plan your intake before the start and never try anything new on race day.

GU Energy Gel Original

GU

GU Energy Gel Original

Energy gel with 100 calories and 21 g of carbohydrates per sachet. Blend of maltodextrin and fructose for optimal absorption. Includes amino acids and electrolytes. The most widely used gel in ultras around the world.

View on Amazon →
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Santa Madre Unusual Gel 45CHO Caffeine Free

Santa Madre

Santa Madre Unusual Gel 45CHO Caffeine Free

Spanish energy gel with a liquid (not gelatinous) texture and 45 g of carbohydrates in a 1:1 glucose:fructose ratio, designed for 90 g+ per hour strategies. Caffeine-free, neutral and fresh flavour. A domestic alternative to high-density carbohydrate gels such as Maurten 160.

View on Amazon →
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226ERS Isotonic Drink

226ERS

226ERS Isotonic Drink

Isotonic powder drink from the Spanish brand 226ERS. Provides carbohydrates, electrolytes and minerals to maintain hydration during exercise. Formula with amylopectin for fast absorption without digestive discomfort.

View on Amazon →
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226ERS Sub9 Salts Electrolytes

226ERS

226ERS Sub9 Salts Electrolytes

Mineral salt capsules with 250 mg of sodium each, plus potassium, magnesium and ginger extract for better digestive tolerance. The highest sodium per capsule from Spain's benchmark endurance brand. Zero calories: you replace salts without touching your gel plan.

View on Amazon →
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PowerBar Energize Original

PowerBar

PowerBar Energize Original

Energy bar with 45 g of carbohydrates per unit. Blend of fast- and slow-absorbing carbohydrates for sustained energy. Chewy texture, ideal for climbs where you can eat calmly.

View on Amazon →
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Clif Bar Original Energy Bar

Clif Bar

Clif Bar Original Energy Bar

Energy bar with 40 g of carbohydrates and 10 g of protein. Organic ingredients and natural flavours. Dense texture, ideal for aid stations or calmer sections. One of the most popular bars in trail running.

View on Amazon →
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Dorimed Medjool Dates

Dorimed

Dorimed Medjool Dates

Palestinian Medjool dates, large and juicy. Each one delivers around 18 g of carbohydrates in a very compact format. Soft texture, easy to chew and with extremely high caloric density. The classic choice among runners looking for natural alternatives to gels.

View on Amazon →
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Browse all nutrition

Tips

  • •One gel or carbohydrate source every 40-45 minutes on long efforts
  • •Salts or electrolytes if it is hot or you sweat a lot
  • •Light solid food (dates, a bar) for the middle section
🍫

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.

→

Getting to Formentera

Transport

Formentera (Illes Balears) is reached by road; the reference city with the nearest station and airport or train is Eivissa.

Browse all transport

Tips

  • •Check parking and access with the organisers
  • •If you arrive by train or plane, pick up a rental car in Eivissa
  • •Arrive early: parking near the start often fills up

Car rental for Formentera Trail 21.1

Car Rental

A car lets you reach the start on time and explore the surroundings before and after the race.

DRIVALIA CarCloud City

DRIVALIA

DRIVALIA CarCloud City

Urban vehicle rental subscription, perfect for getting to races with good highway and conventional road access.

View on Amazon →
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Hertz

Hertz

Hertz

Car rental with one of the world's most recognised brands, with offices at airports and cities across Spain.

View on Hertz →
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Carla Car Rental - Book Now, Pay Later

Carla

Carla Car Rental - Book Now, Pay Later

Car rental comparison in over 180 countries with free cancellation. Book now and pay when you pick up the vehicle, no hidden fees or upfront card charges.

View on Carla →
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Browse all car rental

Tips

  • •Book ahead if you travel at the weekend
  • •Compare airport or station pick-up in Eivissa

Sports insurance for Formentera Trail 21.1

Insurance

Check the rules to see whether the day insurance included in the registration is enough or whether you need a federation licence.

Browse all insurance

Tips

  • •Federation licence or day insurance, depending on the rules
  • •If you travel from abroad, travel insurance with sports cover

Sun protection for Formentera Trail 21.1

Sun Protection

Even in spring, hours outdoors expose your skin. A sweat-resistant sunscreen and lip balm avoid surprises.

Sun Bum Sunscreen Lip Balm SPF 30

Sun Bum

Sun Bum Sunscreen Lip Balm SPF 30

Lip balm with SPF 30 sun protection in stick format. Moisturises and protects lips from sunburn, a spot many runners forget. Coconut flavour, paraben-free.

View on Amazon →
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Piz Buin Mountain SPF 50+

Piz Buin

Piz Buin Mountain SPF 50+

Mountain sunscreen with SPF 50+ formulated for extreme altitude conditions. Extra protection against intensified UV radiation and cold wind. Rich texture that protects skin from dehydration.

View on Amazon →
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Heliocare 360º Sport Transparent Stick SPF 50+

Cantabria Labs

Heliocare 360º Sport Transparent Stick SPF 50+

Transparent SPF 50+ sun stick, 25 g, with 360º protection (UVA, UVB, visible light and infrared). Goes on dry in seconds over face, ears, neck and bald scalp with no sticky hands and no white cast: the format built for reapplying at an aid station. High water and sweat resistance, from a Spanish pharmacy brand.

View on Amazon →
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Suntribe Natural Mineral Sport Sunscreen SPF 50

Suntribe

Suntribe Natural Mineral Sport Sunscreen SPF 50

Natural mineral sport sunscreen with SPF 50 designed for sports. Eco-friendly, 100% natural and reef-safe. Non-nano mineral UV filters. Very water and sweat resistant. 100 ml format.

View on Amazon →
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d'Alba Air Fit Fresh Stick SPF 50+ PA++++

d'Alba

d'Alba Air Fit Fresh Stick SPF 50+ PA++++

Facial SPF 50+ PA++++ sun stick, 19 g, Korean skincare, vegan and fragrance-free. Dry, powdery finish, not sticky, doesn't sting the eyes when you sweat: comfortable for daily training and shorter races. The lightest and cheapest option in the comparison.

View on Amazon →
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FUKA ERI Mineral Zinc Sunscreen SPF 50

FUKA ERI

FUKA ERI Mineral Zinc Sunscreen SPF 50

Mineral zinc sunscreen with non-nano SPF 50. 100% natural ingredients, vegan and waterproof. Suitable for face and body. Plastic-free packaging, easy to spread. 100 g format.

View on Amazon →
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Columbia Schooner Bank II Cachalot

Columbia

Columbia Schooner Bank II Cachalot

Legionnaire-style cap with neck flap, ideal for long-duration races with intense sun exposure. Covers the neck and ears, two of the areas most prone to sunburn in the mountains.

View on Amazon →
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Browse all sun protection

Tips

  • •SPF50 sweat-resistant sunscreen
  • •Protect lips and ears
🧴

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.

→

Body care for Formentera Trail 21.1

Body Care

Feet, chafing and eyes are the first things to fail. Blister patches, anti-chafe balm and sunglasses are basics.

BodyGlide Original Anti-Chafe Balm

BodyGlide

BodyGlide Original Anti-Chafe Balm

Anti-chafe balm in stick format. Creates an invisible barrier on the skin that reduces friction without clogging pores. Sweat-resistant, ideal for critical zones like inner thighs, armpits, and nipples on long races.

View on Amazon →
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Compeed Blister Plasters Medium Duo

Compeed

Compeed Blister Plasters Medium Duo

Hydrocolloid blister plasters for medium blisters. Instant pain relief, protect the blister while it heals and stay in place for hours even with sweat. Pack of 10 individually wrapped plasters, ideal for carrying in a trail running vest.

View on Amazon →
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Leukotape P Sports Tape

BSN Medical (Leukotape)

Leukotape P Sports Tape

Rigid zinc-oxide adhesive tape, the ultra runner favourite for preventing blisters on hot spots (heel, toes, sole). Applied before the race, it holds for hours through sweat and water.

View on Amazon →
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Squirrel's Nut Butter Anti-Chafe Cream

Squirrel's Nut Butter

Squirrel's Nut Butter Anti-Chafe Cream

All-natural anti-chafe balm in a compostable tube. Apply to feet, thighs, underarms or bib area before the start to prevent rubbing on long races.

View on Amazon →
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ENGO Rectangular Anti-Blister Patches (15 pcs)

ENGO

ENGO Rectangular Anti-Blister Patches (15 pcs)

Low-friction patches that stick inside the shoe (not on the skin) and cut the rubbing that causes blisters. Trim to fit any footwear. Pack of 15.

View on Amazon →
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Buff CoolNet UV+

Buff

Buff CoolNet UV+

Multifunctional tubular with UPF 50+ UV protection and cooling technology. Can be worn as neck gaiter, headband, balaclava or wristband. CoolNet fabric reflects UV rays and cools the skin by evaporation.

View on Amazon →
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Compressport Full Socks Recovery

Compressport

Compressport Full Socks Recovery

Full-length compression socks (foot to knee) designed specifically for post-exercise recovery. Graduated compression that improves venous return and reduces swelling. Breathable fabric with infrared fibres that improve microcirculation.

View on Amazon →
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Browse all body care

Tips

  • •Anti-chafe balm on underarms, thighs and feet
  • •Keep blister patches in your finish bag

Frequently Asked Questions

When is Formentera Trail 21.1 2027?
On Saturday 5 June 2027. The main start is scheduled for 9:00 according to the registration page.
What distances does Formentera Trail 21.1 offer?
Formentera Trail 21.1K, Short trail 10K and Caminadores 10K. Elevation gain is shown only where the organisers have published it.
How much does registration cost?
The fees published on RockTheSport range from 14 EUR to 39 EUR. Registration opened on 20 August 2026 and closes on 3 June 2027.
Where does it take place?
In Formentera (Illes Balears). The nearest reference city with the widest choice of accommodation and transport is Eivissa.
Where do I register?
Through RockTheSport, the official registration platform for the race. Always check dates and rules on the organisers' website.

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