Photo: Zarateman (CC0), Wikimedia Commons (opens in a new tab) / Source (opens in a new tab)Arrasate / Mondragón
Arrasate-Udalatx Mendi Lasterketa
Saturday, 27 February 2027
Arrasate-Udalatx 22K
22km D+ 1400m
Your checklist for Arrasate-Udalatx Mendi Lasterketa
What you need, category by category, with our #1 pick for this race. Tick what you already have.
0 of 8 ready
Swipe to see all 9 categories
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GPS watch
Done, you already have it
View on Amazon →(opens in a new tab)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)
Gear
Lugged outsole: wet Udalatx limestone is slippery
Done, you already have it
View on Amazon →(opens in a new tab)Salomon Speedcross 6
Exceptional grip in mud and technical terrain
Downside: Average durability on pavement
Nutrition
One gel every 40-45 minutes
Done, you already have it
View on Amazon →(opens in a new tab)Maurten Gel 100
Hydrogel technology: excellent gastric tolerance
Downside: High price compared to other gels
Sun Protection
Sunscreen on face and ears
Done, you already have it
View on Amazon →(opens in a new tab)Piz Buin Mountain SPF 50+
Specifically formulated for altitude and cold
Downside: Thicker texture, takes longer to absorb
Body Care
Anti-chafe on friction areas before the start
Done, you already have it
View on Amazon →(opens in a new tab)Compeed Blister Plasters Medium Duo
Instant pain relief on application
Downside: Medium size may not cover large blisters
Car Rental
Pick up the car at Bilbao airport or in the city
Done, you already have it
View on Amazon →(opens in a new tab)DRIVALIA CarCloud Country Plus
Mandatory
Emergency blanket
Thermal survival blanket of at least 1.20 x 2.10 m
Done, you already have it
View on Amazon →(opens in a new tab)Lifesystems Thermal Blanket
Mandatory
Reusable cup
Reusable cup or soft flask
Done, you already have it
View on Amazon →(opens in a new tab)Salomon Soft Flask 250 ml
High-flow valve: quick sips without hard biting
Downside: Pricier than generic Amazon flasks
Trip logistics
Registration, travel and insurance: what you should have sorted before race day.
Affiliate links: if you buy, we earn a commission at no extra cost to you.
Mandatory Gear
According to the official race regulations
Emergency blanket
Thermal survival blanket of at least 1.20 x 2.10 m
Reusable cup
Reusable cup or soft flask
Items tagged “Mandatory” are in the checklist above, with a recommended product.
Race data
Terrain
Mountain
Difficulty
Advanced
Distance
1 modalities
Arrasate-Udalatx 22K
Price: 30 EUR
- Distance
- 22 km
- Elevation Gain
- D+ 1400m
- Max Time
- 4h15
| Modality | Distance | Elevation Gain | Max Time | Price |
|---|---|---|---|---|
| Arrasate-Udalatx 22K | 22 km | D+ 1400m | 4h15 | 30 EUR |
Will your watch battery last the ~6 h of Arrasate-Udalatx Mendi Lasterketa?Worked out for the longest course (22 km). See which watches reach the finish with GPS on and which die on the way.Check my watch Check my watchSeasonal kit
Cold weather at Arrasate-Udalatx Mendi Lasterketa: pack the winter kit
Layers, gloves, neck gaiter and footwear for running in the cold, with short-race and ultra versions.
See the full kit : What to Wear for Cold-Weather Trail Running 2026: The Complete Layering KitArrasate-Udalatx Mendi Lasterketa requires mandatory gear: get it sorted early
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 10 °C: guide and kit →
Typical weather for the race date (10-year average)
Temperature
5°C – 13°C
Average 8°C
Rain
47%
6.6 mm avg
Wind
16 km/h
max. average
Sunshine hours
6h
daily average
Gear recommendations
Bring a waterproof jacket (47% chance of rain)
Asics
Asics Gel-Trabuco 14 GTX
A best-selling beginner trail shoe: GEL cushioning, good stability and a waterproof GORE-TEX membrane. Versatile and reliable for training on mixed terrain in any weather.
Berghaus
Berghaus Paclite 2.0 GTX
Waterproof jacket with a Gore-Tex Paclite membrane (around 330 g). Fully waterproof with taped seams, fixed adjustable hood, storm flap behind the zip and cuff adjustment. Packs down small in a vest. Heavier than a pure running hardshell, but it meets the waterproof-breathable membrane requirement in race rules and is the affordable route into Gore-Tex.
Brooks
Brooks Cascadia 20 GTX
The Cascadia 20 with a GORE-TEX membrane: stability and protection for rocky mountain terrain, keeping the foot dry on cold, rainy days.
Gore Wear
Gore Wear C5 GORE-TEX Glove
Glove with a fully waterproof, windproof GORE-TEX membrane and light insulation. The pick for running in snow, sleet or heavy rain while keeping your hand dry.
Gore Wear
Gore Wear M GORE-TEX Thermo Glove
Warmer variant of the Gore Wear C5 GORE-TEX: the same fully waterproof, windproof membrane, with extra thermal lining for intense cold on top of snow or rain. The pick when the problem isn't just water, but water AND hard cold at once.
Gore Wear
Gore Wear R7 GTX Shakedry
Ultralight Gore-Tex Shakedry waterproof jacket (110 g). Full waterproofing without an inner membrane, highly breathable. The benchmark for mountain runners.
Nike
Nike Pegasus Trail 5 GORE-TEX
The best-selling gateway trail shoe: comfortable, cushioned and versatile for moving from road to trail. Waterproof GORE-TEX version, perfect for beginners and easy runs on mixed terrain.
Salomon
Salomon Bonatti Pro Waterproof Glove
Lightweight waterproof glove built for running, not just standing still in the snow: a waterproof membrane with more dexterity and less bulk than a thick membrane glove, for sustained rain without giving up handling gels or poles.
Salomon
Salomon Bonatti WP
Ultralight waterproof windproof jacket (135 g). Taped seams, adjustable hood and back ventilation. Packs into its own pocket.
Salomon
Salomon Speedcross 6 GTX
The Speedcross 6 with a GORE-TEX membrane: the same aggressive 5 mm lugs for mud and soft ground, now waterproof for winter, rain and snow.
Sealskinz
Sealskinz Waterproof Lightweight Glove
Lightweight waterproof glove from a brand that specializes in outdoor sport waterproofing. A solid middle ground between a thin windproof glove and a thick membrane glove: genuinely waterproof without the bulk or price of the Gore C5.
Shokz
Shokz OpenRun
Open-ear bone conduction headphones with IP67 rating: they take rain, mud and a rinse under the tap. Up to 8 h of battery and quick charge (10 min for 1.5 h). The most rugged pick of the range for training in bad weather.
TRIWONDER
TRIWONDER Waterproof Trail Gaiters
Waterproof, breathable low gaiters for trail running, hiking and mountain use. Under-shoe strap and adjustable elastic band. A budget-friendly alternative to premium technical brand gaiters.
Bring thermal layers (low of 5°C)
Buff
Buff Thermonet
Thermal tubular Buff with Primaloft technology. Traps body heat, ultralight and versatile: hat, neck gaiter, headband. Ideal for high mountain.
Craft
Craft Pro Hypervent LS Wind Top
Thermal top with a windproof ripstop panel on the chest and a highly ventilated soft jersey back. Built for high-intensity sessions in cold, windy conditions, with long cuffs and thumb loops.
HANKER
HANKER Thermal Neck Gaiter
Unisex thermal seamless neck gaiter in Soft Air Plus fabric (97% polyester). Seamless fit designed for trail running, cycling, motorcycling and outdoor sports. A budget alternative to Buff for moderate cold.
Icebreaker
Icebreaker Merino 200 Oasis LS Crewe
Long-sleeve thermal top in 100% merino wool (200g). Natural temperature regulation, genuine multi-day odor resistance and a soft, non-itch handfeel from the fine merino yarn.
Odlo
Odlo Active Warm Eco
Long-sleeve thermal base layer made from recycled fabric with anti-odour treatment. Active thermal regulation, ideal as a base layer in the mountains.
Odlo
Odlo I-Thermic Women's Longsleeve
Women's long-sleeve thermal top with insulating panels placed over cold-sensitive areas (lower back and kidneys). A mid-layer built for genuinely cold winter conditions, mountain outings or cross-country-style trail sessions.
ROCKBROS
ROCKBROS Thermal Windproof Balaclava
Thermal windproof balaclava covering head, ears, cheeks and neck. Designed for cycling and motorcycling, it works just as well on windy, freezing trail runs.
Salomon
Salomon Agile LS Tee
Lightweight quick-dry polyester long-sleeve tee with underarm mesh, a side pocket and reflective details. Works as a standalone layer in mild cold or as a base layer under a windbreaker on colder days.
Salomon
Salomon Cross Run Tight
Long trail tights with stretchy, breathable fabric. Adjustable waist, zipped back pocket. Protection from cold and vegetation.
Salomon
Salomon Cross Warm Glove
Thermal running gloves with a non-slip palm and touchscreen fingertips. Light, warm and compatible with poles.
Under Armour
Under Armour ColdGear Armour Compression Mock
Compression thermal top with a dual-layer fabric: ultra-warm brushed interior and quick-dry exterior. Second-skin compression fit with stretch mesh panels at the back and underarms for ventilation without losing warmth.
Under Armour
Under Armour ColdGear Armour Compression Mock (Men's)
Men's high-neck thermal compression top: brushed interior that holds heat and a quick-dry outer. Base layer for cold-weather runs.
Bring thermal gloves (low of 5°C)
Gore Wear
Gore Wear C5 GORE-TEX Glove
Glove with a fully waterproof, windproof GORE-TEX membrane and light insulation. The pick for running in snow, sleet or heavy rain while keeping your hand dry.
Gore Wear
Gore Wear M GORE-TEX Thermo Glove
Warmer variant of the Gore Wear C5 GORE-TEX: the same fully waterproof, windproof membrane, with extra thermal lining for intense cold on top of snow or rain. The pick when the problem isn't just water, but water AND hard cold at once.
Icebreaker
Icebreaker Oasis Liners
Thin merino wool glove, lightweight and breathable, with good moisture management and none of the overheating of a thick technical glove. Ideal as a liner layer or for mild winter temperatures.
LEKI
LEKI Ultra Trail Storm Shark
Glove for pole runners with the Shark system: clips straight into the grip of compatible LEKI poles, transferring force without closing your hand. Windproof and water-repellent.
Ronhill
Ronhill GORE-TEX Windstopper Glove
Running glove with GORE-TEX Windstopper fabric: blocks wind and repels light rain without the bulk of an insulated glove. Thin, close-fitting and dexterous.
Salomon
Salomon Bonatti Pro Waterproof Glove
Lightweight waterproof glove built for running, not just standing still in the snow: a waterproof membrane with more dexterity and less bulk than a thick membrane glove, for sustained rain without giving up handling gels or poles.
Salomon
Salomon Cross Warm Glove
Thermal running gloves with a non-slip palm and touchscreen fingertips. Light, warm and compatible with poles.
Salomon
Salomon Fast Wing Winter Glove
Technical winter trail running glove with a windproof outer shell and warm lining. Built for long outings in intense cold, wind and some moisture in the mountains.
Sealskinz
Sealskinz Waterproof Lightweight Glove
Lightweight waterproof glove from a brand that specializes in outdoor sport waterproofing. A solid middle ground between a thin windproof glove and a thick membrane glove: genuinely waterproof without the bulk or price of the Gore C5.
Consider long tights for nighttime cold
Amazon Essentials
Amazon Essentials Active Sculpt Plus-Size Leggings
High-waisted leggings with Active Sculpt compression fabric, available in plus sizes. Wide waistband that doesn't roll down or over-compress during long mountain outings.
HANKER
HANKER Women's Cropped Compression Leggings with Pockets
Compression capri tights with high waist and phone pockets. Quick-drying, suitable for running and trail.
Izas
Izas Olimpia Women's Long Tights
Women's long leggings with a shaping, push-up compression effect, stretch breathable fabric and reflective details. Originally designed for gym and yoga, but the compression and reflective details also make it usable for low-light running.
Joma
Joma Academy Knight Men's Thermal Tights
Men's thermal pants with a brushed inner lining, built for training and running in cold weather. Elastic drawstring waist and heat-retaining fabric for winter outings or cold early mornings.
Joma
Joma Vela II Women's Shorts
Lightweight, stretch women's running shorts with a wide size range (4XS to 2XL). Breathable fabric built for training and running in summer without overheating.
Salomon
Salomon Comet Warm Tight W
Salomon women's thermal long tights for training and racing in the cold. A warm layer for autumn and winter.
Salomon
Salomon Cross Run Tight
Long trail tights with stretchy, breathable fabric. Adjustable waist, zipped back pocket. Protection from cold and vegetation.
Forecast for 27 February
Weather forecast from Open-Meteo (may change until race day)
Arrasate-Udalatx mendi lasterketa
The Arrasate-Udalatx is a mountain race that climbs from Arrasate / Mondragón, in the Alto Deba valley (Gipuzkoa), to the limestone massif of Udalatx (Udalaitz), the area’s most recognisable peak. It is organised by Mondraitz Kirol Kluba, and the 11th edition takes place on Saturday 27 February 2027, with the start at 09:30.
A 22 km course with 1,400 m of climbing
The race covers 22 km with 1,400 m of positive elevation gain, starting and finishing at Herriko Plaza, with 5 aid stations. Expect:
- Long climbs from the valley up to the white limestone ridges of Udalatx.
- Technical descents on rock and damp trail, where grip makes the difference.
- Track and trail sections where you can recover your rhythm.
The time limit is 4 h 15 min, with checkpoints at km 13 (Balcón de Txukurrillo) and km 18 (Udala district). The route changes slightly from year to year: in 2025 the organisers altered it to protect birdlife, avoiding the Besaide area and adding the Anporreta summit. The 2027 course and GPX are on the official website.
February in the Basque Country
The race is held in mid-winter: mud, wet rock and wind on the summits. Mandatory gear includes a windproof jacket, a thermal survival blanket and a cup or soft flask. Places are allocated by lottery from 17 to 31 October 2026 (400 bibs); see the details on the organiser’s registration page.
Arrasate and the Alto Deba beyond the race
Arrasate is an industrial, cooperative-minded town with good pintxos bars and cider houses close by. Bergara, Oñati and the Arantzazu sanctuary are a few kilometres away. If you are planning a trail season in the Basque Country, see the other races in the Basque Country region and organise dates with the season planner.
360Complete Pack
Arrasate-Udalatx 2027 registration
RegistrationRegistration is by lottery from 17 to 31 October 2026 (Kronoak). There are 400 bibs and the fee is €30.
Tips
- •Lottery entry from 17 October 00:00 to 31 October 23:59; the draw is on 1 November
- •400 bibs, 100 reserved for Arrasate-Mondragón residents; selected runners pay before 9 November
- •Minimum age 18; refunds only with a medical certificate before 27 January 2027
- •Registration includes civil liability and accident insurance
Where to stay for Arrasate-Udalatx
AccommodationArrasate / Mondragón has hotels and guesthouses, and nearby towns in Debagoiena and Gipuzkoa add options.
Tips
- •Book early: February is low season, but beds near the start go fast
- •Bergara, Oñati and Eskoriatza are a few kilometres away
- •Vitoria-Gasteiz and Bilbao offer more choice if you stay further out
Gear for Arrasate-Udalatx
Gear22 km with 1,400 m of climbing over limestone and forest in February: you need grip on wet rock, a windproof and poles for the climbs.
Tips
- •Lugged outsole: wet Udalatx limestone is slippery
- •Windproof, survival blanket and cup or soft flask are mandatory
- •Poles help on the long ramps
- •Headlamp if the morning is dark and overcast
Which shoes for Arrasate-Udalatx Mendi Lasterketa?
Which footwear fits based on the race's terrain and weather
Which GPS watch for Arrasate-Udalatx Mendi Lasterketa?
Which watch has the battery to last based on your estimated finish time
Best Neck Gaiter (Buff) for Trail Running 2026: Comparison & Buying Guide
Comparison of the best neck gaiters for trail running in 2026: Buff Original, Midweight, Windproof, DryFlx, CoolNet UV+, Thermonet, HANKER and Salomon Merino. Which to pick based on sun, wind, cold or budget.
Best Thermal Base Layer for Trail Running 2026: Comparison & Buying Guide
The best thermal base layers for trail running in 2026: Odlo Active Warm Eco, Icebreaker Merino 200 Oasis, Craft Pro Hypervent, Under Armour ColdGear, Salomon Agile LS Tee and Odlo I-Thermic. Which to pick based on cold, sweat management, merino wool, compression or built-in wind protection.
Best Trail Running Gaiters 2026: 3-Way Comparison
Comparing the 3 best trail running gaiters in 2026: Salomon Trail Gaiters High, Salomon Trail Gaiters Low and TRIWONDER waterproof gaiters. Which to pick by terrain and budget.
Nutrition for Arrasate-Udalatx
NutritionA short but punchy race with 5 aid stations. Gels and an electrolyte drink cover the stretches between stops without extra weight.
Tips
- •One gel every 40-45 minutes
- •Drink even when it is cold
- •Light breakfast 2-3 hours before the 09:30 start
How to get to Arrasate / Mondragón
TransportArrasate sits in the Alto Deba valley, well connected by the AP-1 and GI-627 between Vitoria-Gasteiz, Bilbao and San Sebastián.
Tips
- •From Bilbao: about 1 hour by car
- •From San Sebastián or Vitoria-Gasteiz: roughly 50-60 minutes
- •Euskotren trains run to Bergara with a local connection
Car rental for Arrasate-Udalatx
Car RentalIf you fly into Bilbao, San Sebastián or Vitoria, a rental car is the easiest way to reach the start.
Tips
- •Pick up the car at Bilbao airport or in the city
- •Book early if you travel from outside the Basque Country
Sports insurance for Arrasate-Udalatx
InsuranceRegistration includes civil liability and accident insurance. Even so, this is technical mountain terrain where rescue is hard.
Tips
- •Check whether your federation licence covers trail running
- •Consider insurance with mountain rescue cover
- •Read in the rules what the organiser's insurance covers
Sun protection for Arrasate-Udalatx
Sun ProtectionThe February sun is mild, but the Udalatx summit is bare white limestone that reflects a lot of light.
Tips
- •Sunscreen on face and ears
- •SPF lip balm even in the cold
Body care for Arrasate-Udalatx
Body CareWith 1,400 m of climbing and technical descents on damp ground, blisters and chafing are the usual problems.
Tips
- •Anti-chafe on friction areas before the start
- •Seamless technical socks
- •Massage and recovery after the race
Frequently Asked Questions
- When is Arrasate-Udalatx 2027?
- The 11th edition is on Saturday 27 February 2027 in Arrasate / Mondragón (Gipuzkoa), starting at 09:30.
- How does registration work?
- It is a lottery run through Kronoak, from 17 October 2026 at 00:00 to 31 October at 23:59. The draw is on 1 November and selected runners pay before 9 November. There are 400 bibs (100 reserved for Arrasate-Mondragón residents) and the fee is €30.
- What are the distance and elevation?
- 22 km with 1,400 m of positive elevation gain, starting and finishing at Herriko Plaza with 5 aid stations.
- What is the time limit?
- 4 h 15 min to finish. There is a checkpoint at km 13 (Balcón de Txukurrillo) with a 2 h 45 min cut-off and another at km 18 (Udala district) with a 3 h 45 min cut-off.
- What gear is mandatory?
- A windproof jacket, a thermal survival blanket of at least 1.20 x 2.10 m and a reusable cup or soft flask. The organiser may require more depending on the weather.
- Where is the start and when do I collect my bib?
- The start is at Herriko Plaza in Arrasate at 09:30. Bibs are collected at Intersport Loramendi (San Andrés district) on 25 and 26 February, or on race day from 08:30 to 09:30 in the square.
- Who organises it?
- Mondraitz Kirol Kluba organises it. The registration lottery is run through Kronoak.
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