Photo: Trail Siero (opens in a new tab)Pola de Siero
Trail Siero
Sunday, 8 November 2026
Trail Siero
25km D+ 1050m
Relay
25km D+ 1050m
Trail Corto
11.5km D+ 300m
Andarines
8.5km D+ 200m
Race data
Terrain
Trail
Difficulty
Intermediate
Distance
4 modalities
Trail Siero
Price: 25 EUR
- Distance
- 25 km
- Elevation Gain
- D+ 1050m
- Max Time
- -
Relay
Price: 17 EUR
- Distance
- 25 km
- Elevation Gain
- D+ 1050m
- Max Time
- -
Trail Corto
Price: 16 EUR
- Distance
- 11.5 km
- Elevation Gain
- D+ 300m
- Max Time
- -
Andarines
Price: 10 EUR
- Distance
- 8.5 km
- Elevation Gain
- D+ 200m
- Max Time
- -
| Modality | Distance | Elevation Gain | Max Time | Price |
|---|---|---|---|---|
| Trail Siero | 25 km | D+ 1050m | - | 25 EUR |
| Relay | 25 km | D+ 1050m | - | 17 EUR |
| Trail Corto | 11.5 km | D+ 300m | - | 16 EUR |
| Andarines | 8.5 km | D+ 200m | - | 10 EUR |
Will your watch battery last the ~5 h of Trail Siero?Worked out for the longest course (25 km). See which watches reach the finish with GPS on and which die on the way.Check my watch Check my watchYour checklist for Trail Siero
What you need, category by category, with our #1 pick for this race. Tick what you already have.
0 of 6 ready
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
Versatile trail shoes, no need for maximum technical grip
Done, you already have it
View on Amazon →(opens in a new tab)
Salomon Speedcross 6
Agarre excepcional en barro y terreno técnico
Downside: Durabilidad media en asfalto
Nutrition
A couple of gels are usually enough to complete the 25K
Done, you already have it
View on Amazon →(opens in a new tab)
226ERS Isotonic Drink
Marca española referente en nutrición deportiva
Downside: Requiere preparación previa con agua
Sun Protection
Apply sunscreen before the start, even in November
Done, you already have it
View on Amazon →(opens in a new tab)
ISDIN Fotoprotector Fusion Water SPF 50+
Ultralight texture, feels invisible on skin
Downside: Small format (50 ml), may run short on ultras
Body Care
A light buff is useful on the descent through the pine forest
Done, you already have it
View on Amazon →(opens in a new tab)
Buff CoolNet UV+
UPF 50+: blocks 98% of UV radiation
Downside: UV protection decreases with wear after many washes
Car Rental
Pick up the car in Oviedo or Gijón, both just 15-20 minutes away
Done, you already have it
View on Amazon →(opens in a new tab)
DRIVALIA Alquiler de vehículos por Suscripción CarCloud City
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.
Seasonal kit
Rain and mud at Trail Siero: pack this kit
Grippy shoes, rain jacket, gaiters and blister protection for a wet race.
See the full kit : Rain and Mud Trail Running Kit 2026: What to Bring to a Wet RaceYou may also need: What to Wear for Cold-Weather Trail Running 2026: The Complete Layering Kit
Trail Siero 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
8°C – 15°C
Average 11°C
Rain
63%
5.8 mm avg
Wind
17 km/h
max. average
Sunshine hours
7h
daily average
Gear recommendations
Bring a waterproof jacket (63% 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
Chubasquero Gore-Tex Shakedry ultraligero (110 g). Impermeabilidad total sin membrana interior, altamente transpirable. El referente para corredores de montaña.
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
Chaqueta cortavientos impermeable ultraligera (135 g). Costuras selladas, capucha ajustable y ventilación trasera. Se pliega en su propio bolsillo.
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.
TRIWONDER
TRIWONDER Polainas Impermeables Trail
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 8°C)
Buff
Buff Thermonet
Buff tubular térmico con tecnología Primaloft. Retiene el calor corporal, ultraligero y polivalente: gorro, braga, cinta. Ideal para alta montaña.
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 Braga de Cuello Térmica
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
Camiseta térmica de manga larga con tejido reciclado y tratamiento antiolor. Regulación térmica activa, ideal como capa base en montaña.
Odlo
Odlo I-Thermic Longsleeve Mujer
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 Pasamontañas Térmico y Cortaviento
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
Mallas largas de trail con tejido elástico y transpirable. Cintura ajustable, bolsillo trasero con cremallera. Protección contra el frío y la vegetación.
Salomon
Salomon Cross Warm Glove
Guantes térmicos de running con palma antideslizante y puntas táctiles. Ligeros, cálidos y compatibles con bastones.
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 Hombre
Men's high-neck thermal compression top: brushed interior that holds heat and a quick-dry outer. Base layer for cold-weather runs.
Forecast for 8 November
Weather forecast from Open-Meteo (may change until race day)
Trail Siero
Trail Siero has become one of the reference autumn events in central Asturias. Organized by Actitude Eventos together with the Siero Municipal Sports Board, the race reaches its fourth edition in 2026, starting and finishing at Pola de Siero’s Plaza Cubierta.
A route between town and hills
The main course (25K, 1,050m of climbing) leaves via Calle Marquesa de Canillejas towards the La Isla neighbourhood and the Feve station, before climbing to Cerro Gavio (707m), the highest point of the Siero municipality, with a final descent through pine forest back to the town centre. The category can also be run as a relay, split into two legs of 13K and 12K.
For those looking for a shorter distance, the Trail Corto (11.5K, 300m of climbing) covers a reduced version of the circuit, while the Andarines (8.5K) offer a non-competitive option to complete the course on foot, with a kids’ version (Crece Trail Siero) that turns the day into a family event.
An accessible race in central Asturias
Pola de Siero’s closeness to Oviedo and Gijón, both about 15-20 minutes away, makes this one of the most accessible races on the Asturian calendar, which explains its high turnout (up to 250 runners in the main distance, plus the short and relay categories).
Siero beyond the race
After the race, take the chance to explore Pola de Siero’s historic centre or rest at the nearby Parque de Vega Poja. Discover other races in the Asturias region and plan your visit with the race planner.
Mandatory Gear
According to the official race regulations
Recommended at the aid stations
Fully charged
360Complete Pack
Trail Siero 2026 registration
RegistrationOrganized by Actitude Eventos with the Siero Municipal Sports Board. Registration through RockTheSport, open from June 30 until November 2, 2026 or until spots run out (maximum 250 in Trail Siero).
Tips
- •Choose between Trail Siero (25K), Relay, Trail Corto (11.5K) or Andarines (8.5K) depending on your level
- •Spots are limited: register early, especially for the relay category
Where to stay in Pola de Siero
AccommodationPola de Siero has good accommodation options thanks to its closeness to Oviedo and Gijón.
Tips
- •Pola de Siero's town centre has hotels and guesthouses close to the start
- •Oviedo and Gijón, 15 minutes away, greatly widen the options if you prefer more choices
Gear for Trail Siero
GearA standard trail course with an initial urban stretch, the climb to Cerro Gavio and a final descent through pine forest.
Tips
- •Versatile trail shoes, no need for maximum technical grip
- •For the Andarines category, comfortable hiking shoes are enough
Which shoes for Trail Siero?
Which footwear fits based on the race's terrain and weather
Which GPS watch for Trail Siero?
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 Trail Siero
NutritionTrail Siero (25K, 1,050m of climbing) requires hydration and some energy intake for several hours of effort.
Tips
- •A couple of gels are usually enough to complete the 25K
How to get to Pola de Siero
TransportPola de Siero is in central Asturias, very well connected to Oviedo and Gijón.
Tips
- •About 15 minutes from Oviedo via the AS-II
- •About 20 minutes from Gijón via the AS-II
Car rental for Trail Siero
Car RentalA car makes it easy to reach Pola de Siero from anywhere in central Asturias.
Tips
- •Pick up the car in Oviedo or Gijón, both just 15-20 minutes away
Sports insurance for Trail Siero
InsuranceValid insurance is required to take the start.
Tips
- •Federation licence or day insurance mandatory
Sun protection for Trail Siero
Sun ProtectionThe course combines urban stretches with hills and pine forest.
Tips
- •Apply sunscreen before the start, even in November
Body care for Trail Siero
Body CareA well-established, accessible race, also suitable for those starting out with medium distances.
Tips
- •A light buff is useful on the descent through the pine forest
Frequently Asked Questions
- When is Trail Siero 2026?
- Sunday, November 8, 2026, starting and finishing at Pola de Siero's Plaza Cubierta. Registration closes November 2 or once spots run out.
- What distances does Trail Siero offer?
- Four categories: Trail Siero (25K, also available as a relay of 13K+12K), Trail Corto (11.5K) and Andarines (8.5K, non-competitive).
- What is the highest point of the course?
- Cerro Gavio, at 707m, the highest point of the Siero municipality, followed by a final descent through pine forest.
- How do I get to Pola de Siero?
- Pola de Siero is in central Asturias, about 15 minutes from both Oviedo and Gijón.
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