Paterna del Madera, Albacete
La Osera
Saturday, 15 May 2027estimated date
Marathon 45K
45km D+ 2300m
Half Marathon 25K
25km D+ 1300m
Sprint Trail 12K
12km D+ 600m
Hiking 12K
12km D+ 600m
La Osera 2027: estimated date 15 May 2027
The organiser has not published the official 2027 schedule yet. The estimated date is based on last year's edition; we'll confirm it as soon as it's announced. Start sorting your gear and logistics.
Race data
| Modality | Distance | Elevation Gain | Max Time | Price |
|---|---|---|---|---|
| Marathon 45K | 45 km | D+ 2300m | - | 38 EUR |
| Half Marathon 25K | 25 km | D+ 1300m | - | 28 EUR |
| Sprint Trail 12K | 12 km | D+ 600m | - | 25 EUR |
| Hiking 12K | 12 km | D+ 600m | - | 25 EUR |
Gear up for La Osera
Buying guides with the best value for money, picked for this kind of terrain.
What you need
Salomon
Salomon Speedcross 6
Maurten
Maurten Gel 100
Gourmet Latino
Bocadillo de Guayaba Gourmet Latino
How long will it take you?
Estimate your race time based on distance, elevation and your runner level.
Historical weather
Typical weather for the race date (10-year average)
Temperature
9°C – 19°C
Average 14°C
Rain
23%
1.5 mm avg
Wind
19 km/h
max. average
Sunshine hours
12h
daily average
Gear recommendations
Bring thermal layers (low of 9°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.
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.
Forecast for 15 May
Real-time data from Open-Meteo
La Osera
La Osera is a mountain race held in Paterna del Madera (Albacete), a village nestled between the Sierra del Segura and Sierra de Alcaraz. The 6th edition (2026) offers four distances: a 45 km Marathon, a 25 km Half Marathon, a 12 km Sprint Trail and a 12 km Hiking option. The event is organised as a non-profit, with all income going entirely towards covering costs.
The course
The routes follow the Verdenace Trail Network, 265 km of trails approved by the Castilla-La Mancha Mountain Sports Federation. The marathon passes through landmarks such as La Almenara (1,800m), La Cuerda Larga and Los Gallineros, crossing rivers like the Viñazos, the Endrinales and Las Hoyas. A fast profile with technical sections and ridge traversals. Use our pace calculator to plan your splits on the Marathon 45K.
Sierra del Segura and Sierra de Alcaraz
Paterna del Madera lies in one of the most biodiverse areas of Castilla-La Mancha. The pine forests, holm oak groves, valleys and peaks of these mountain ranges offer authentic mountain scenery. The Verdenace trail network connects hamlets like El Encebrico, Batán del Puerto and Puerto de la Solana, allowing runners to discover hard-to-reach corners of the sierra.
OseraFest
After the race, the organisation hosts the OseraFest, a celebration bringing together runners, supporters and locals. La Osera is more than a race: it is an event born from a love of mountains and community, made by and for runners.
Check our gear checklist to prepare for the Sierra del Segura terrain, and explore more races in Castilla-La Mancha.
360Complete Pack
Inscripción La Osera 2026
RegistrationVI edición organizada sin ánimo de lucro. Todos los ingresos se destinan íntegramente a cubrir los costes del evento.
Browse all registrationTips
- •Inscripción online en inscripciones.cronomancha.com
- •Maratón 45K: 38 €, Media Maratón 25K: 28 €, Sprint Trail / Senderismo 12K: 25 €
- •Plazo de inscripción hasta el 8 de mayo de 2026
- •OseraFest post-carrera incluido
Dónde dormir para La Osera
AccommodationPaterna del Madera es un pueblo pequeño en la sierra. Opciones limitadas en el pueblo, más variedad en Riópar y Alcaraz.
Browse all accommodationTips
- •Casas rurales en Paterna del Madera y alrededores de la Sierra del Segura
- •Riópar (15 min): alojamientos rurales junto al Nacimiento del Río Mundo
- •Alcaraz (30 min): más opciones de alojamiento
- •Albacete capital (2 horas): la opción más amplia
Material para La Osera
GearTerreno de montaña en la Sierra del Segura y Sierra de Alcaraz. Senderos homologados, crestas y cruces de ríos.
Salomon
Salomon Speedcross 6
Salomon's most versatile trail shoe, ideal for technical terrain and mud. Exceptional grip with Contagrip sole and EnergyCell+ cushioning.
Black Diamond
Black Diamond Distance Carbon Z
Ultralight carbon Z-pole foldable trekking poles. 137 g per pole in 110 cm length, 33 cm folded. EVA grip and adjustable strap. The trail running reference.
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.
Altra
Altra Lone Peak 9
Trail running shoe with zero drop and wide FootShape toe box that allows natural toe splay. 25 mm stack with EGO foam for balanced cushioning without losing ground contact. MaxTrac outsole with 3.5 mm lugs, ideal for non-technical trails, forest tracks and long-distance paths.
New Balance
New Balance Fresh Foam X Hierro v9
The model breaking into Spain's best-seller charts. Fresh Foam X midsole with a solid balance between cushioning and ground feel, a Vibram Megagrip outsole, and a comfortable last suited to wide feet. A reliable all-rounder for training runs and mountain races of any distance.
Saucony
Saucony Peregrine 16
The all-round trail shoe par excellence, with excellent reviews across every type of runner. PWRTRAC outsole with 5 mm lugs for grip on mixed and technical terrain, balanced PWRRUN cushioning, and rock-plate protection depending on the version. The perfect middle ground between responsiveness and protection.
Freet
Freet Feldom 3
100% barefoot trail shoe with zero drop, minimal stack (6 mm sole) and anatomical last that respects the natural width of the foot. No midsole cushioning: maximum proprioception and ground feedback. Multi-directional lugs for dirt trails and paths. Designed for runners already adapted to minimalist footwear or those transitioning gradually from cushioned natural footwear.
Garmin
Garmin Forerunner 965
Premium running watch with a 1.4" AMOLED display, onboard topo maps, multi-band GPS and music. Up to 31 h in GPS mode (19 h multi-band) and 23 days in smartwatch mode, at just 53 g. Garmin's top running watch without the bulk of a Fenix: ideal for marathons and single-day ultras with accurate navigation.
Tips
- •Zapatillas de trail con buen agarre: terreno mixto con sendero, cresta y zona técnica
- •Bastones muy recomendables para la 45K y la 25K
- •Chaleco de hidratación obligatorio para las distancias largas
- •La 45K alcanza los 1.800 m: ropa de abrigo y cortavientos imprescindibles
Which shoes for La Osera?
Which footwear fits based on the race's terrain and weather
Which GPS watch for La Osera?
Which watch has the battery to last based on your estimated finish time
Best Trail Running Poles 2026: Comparison and Buying Guide
The best trail running poles in 2026, compared on technical criteria: Black Diamond Distance Carbon Z, Leki Ultratrail FX.One, Komperdell Carbon FXP Trail and Cascade Mountain Tech. Weight, folded length, aluminium vs carbon, technique and how to pick your size.
Best Trail Running Hydration Vests 2026: Comparison and Buying Guide
In-depth comparison of the best hydration vests and packs for trail running in 2026: Salomon ADV Skin 12 Set, Salomon Active Skin 8, CamelBak Octane, Compressport UltRun Vest, NNormal Race Vest, AONIJIE 10L and HANKER waist belt. Soft flasks vs reservoir, how many litres by distance, how to stop the vest bouncing and how much water to carry.
Best Value Trail and Mountain GPS Watches 2026: Comparison and Buying Guide
The best value-for-money trail and mountain GPS watches in 2026: Coros Pace 3, Amazfit T-Rex 3 and Cheetah Pro, Garmin Forerunner 165 and Suunto Race 2. How much a good trail watch costs, which ones have cheap offline maps, whether an Amazfit performs like a Garmin and which watch to buy for your budget. Figures verified against the manufacturer.
Nutrición para La Osera
NutritionLa 45K con 2.300 m D+ exige una estrategia nutricional seria. La 25K también requiere planificación.
Maurten
Maurten Gel 100
Gel de hidrogel con 25g de carbohidratos. La tecnología de hidrogel encapsula los carbohidratos para una absorción sin molestias gástricas. Sabor neutro, sin edulcorantes artificiales. Usado por corredores de élite en maratón y ultra.
Gourmet Latino
Bocadillo de Guayaba Gourmet Latino
Natural guava bar in individual 26 g format. High in vitamin C and fast-absorbing carbohydrates. Solid texture with easy-open wrapper, perfect for carrying during races. Intense sweet flavor that delivers immediate energy without needing water.
Crown Sport Nutrition
Crown Sport Nutrition 3:1 Recovery+
Recuperador muscular a base de proteína de suero aislada (whey isolate) con ratio carbohidratos-proteína 3:1, enriquecido con L-Leucina y L-Glutamina. Certificado Informed Sport y sin alérgenos añadidos. Formato de 750 g, sabor sandía.
GU
GU Energy Gel Original
Gel energético con 100 calorías y 21g de carbohidratos por sobre. Mezcla de maltodextrina y fructosa para absorción óptima. Incluye aminoácidos y electrolitos. El gel más usado en ultratrails de todo el mundo.
226ERS
226ERS Isotonic Drink
Bebida isotónica en polvo de la marca española 226ERS. Aporta carbohidratos, electrolitos y minerales para mantener la hidratación durante el ejercicio. Fórmula con amilopectina para absorción rápida sin molestias digestivas.
Victory Endurance
Victory Endurance Total Recovery
Preparado en polvo para bebida de recuperación post-entreno con carbohidratos, electrolitos y proteína en ratio BCAA 2:1:1. Incluye 12 vitaminas y 9 minerales para acelerar la recuperación muscular tras un trail largo. Formato de 1250 g, sabor sandía.
226ERS
226ERS Recovery Drink
Muscle recovery shake from Spanish brand 226ERS. Formula with whey protein, amylopectin, amino acids (including glutamine and BCAAs) and minerals. Carb-to-protein ratio optimised for the post-exercise window. Good taste and digestive tolerance.
226ERS
226ERS Sub9 Pro Salts Electrolytes
The caffeinated version of Sub9 Salts: 250 mg of sodium and 40 mg of caffeine per capsule, plus potassium, magnesium and ginger. Made for the final stretch of an ultra, when you need to replace salts and get a lift without opening another caffeine gel.
Tips
- •45K: planifica geles, barritas y sales para 5-8 horas de esfuerzo
- •25K: lleva provisiones para 2-4 horas
- •Avituallamientos en ruta: confirma puntos en la web oficial
- •Desayuno completo 2-3 horas antes de la salida (8:00 AM)
Cómo llegar a Paterna del Madera
TransportPaterna del Madera está en plena sierra, entre la Sierra del Segura y la Sierra de Alcaraz.
Browse all transportTips
- •Desde Madrid: ~3 horas por la A-31 hasta Albacete y luego CM-412 hacia la sierra
- •Desde Albacete: ~2 horas por la CM-412
- •Desde Murcia: ~2h 30 min por la A-30 y CM-412
- •Salida desde el Parque Adolfo Suárez en Paterna del Madera
Alquiler de coche para La Osera
Car RentalCoche imprescindible para llegar a Paterna del Madera. No hay transporte público directo.
DRIVALIA
DRIVALIA Alquiler de vehículos por Suscripción CarCloud Country Plus
SUV/crossover vehicle rental subscription, ideal for reaching mountain races via rural roads and forest tracks.
DRIVALIA
DRIVALIA Alquiler de vehículos por Suscripción CarCloud City
Urban vehicle rental subscription, perfect for getting to races with good highway and conventional road access.
Carla
Carla Car Rental - Reserva ahora, paga después
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.
Hertz
Hertz - Alquiler de coches
Car rental with one of the world's most recognised brands, with offices at airports and cities across Spain.
Tips
- •Carreteras de montaña en buen estado pero sinuosas
- •Sin transporte público directo a Paterna del Madera
Seguro deportivo para La Osera
InsuranceCarrera de montaña en terreno exigente. Licencia federativa o seguro de día recomendado.
Browse all insuranceTips
- •Licencia FDMCM/FEDME o seguro de día recomendable
- •La 45K discurre por zonas remotas de alta montaña
- •Centro de salud más cercano en Riópar
Cuidado corporal para La Osera
Body CareEsfuerzo de larga duración en terreno de montaña. La 45K exige preparación específica.
After Bite
After Bite Xtra Gel
Soothing gel with 3.5% ammonia for immediate relief from skin irritations. Compact format (20 g) ideal for carrying in a trail running vest. Effective against processionary caterpillar urticating hairs, nettles and insect bites.
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.
Julbo
Julbo Aerospeed
Sport sunglasses with Reactiv photochromic lenses that automatically adapt to light conditions (category 1 to 3). Designed for trail running with non-slip temples and integrated ventilation.
OOFOS
OOFOS OOriginal Sport
Unisex recovery sandal with patented OOfoam technology, which absorbs 37% more impact than conventional EVA foam and reduces stress on feet, ankles and back after exertion. Closed thong-style toe post with built-in arch support in the footbed. Machine washable.
Therabody
Theragun Mini (2.ª generación)
Compact massage gun with QuietForce motor and 3 speeds (1750-2400 percussions/min). Weighs just 500g and fits in your race vest or bag. Ideal for self-massage of quads, calves and glutes after a trail.
Compex
Compex Ayre Recovery Boots
Pneumatic pressotherapy boots with 4 sequential air chambers. Dynamic compression that improves venous return and speeds up toxin elimination after mountain races. 3 pressure levels and 20-30 minute sessions. Built-in rechargeable battery.
Salomon
Salomon Mangas Running
Lightweight, breathable and absorbent running sleeves from Salomon, with a comfortable adaptable fit for variable mountain temperature conditions.
Salomon
Salomon Polaina Cuello Merino
Salomon merino wool neck gaiter. Natural warmth, breathable and odour-resistant even after several uses without washing, key for multi-day ultras. Versatile use in the mountains and premium trail running.
Tips
- •Vaselina en zonas de roce: imprescindible para la 45K
- •Calcetines técnicos anti-ampollas
- •Cruces de ríos: lleva calcetines de repuesto si es posible
- •Mayo en la sierra: atención a las garrapatas en zonas de matorral
Protección solar para trail en mayo
Sun ProtectionMayo en la Sierra del Segura tiene radiación UV alta, especialmente en las crestas y zonas abiertas.
ISDIN
ISDIN Fotoprotector Fusion Water SPF 50+
Ultralight water-phase facial sunscreen with SPF 50+. Fluid texture that absorbs instantly with no greasy residue, ideal for applying during a race. Water and sweat resistant.
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.
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.
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.
Julbo
Julbo Aero
Sports sunglasses with a Reactiv photochromic lens that automatically adapts to changing light, an ultralight panoramic frame and the Air Link temple system for a secure, pressure-free fit. Built for high-mountain trail running, where light shifts constantly between forest, rock and open summits.
Buff
Buff Venture Gorra 5 Panel
Lightweight 5-panel cap with UPF 50+ protection, breathable fabric and comfortable fit. Ideal for summer trail running races where weight and ventilation are a priority.
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.
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.
Tips
- •Crema solar SPF 50 en cara, cuello, brazos y piernas
- •Protector labial con SPF
- •Gorra o visera obligatoria para la 45K
- •Reaplicar en los avituallamientos para esfuerzos de más de 4 horas
Best Sunscreen for Runners 2026: 7 Sweat-Proof SPF 50 Picks
Which sunscreen survives a sweaty long run? We tested 7 SPF 50 sweat-proof picks — creams, sticks and a lip balm — against heat, altitude UV and hours of sweat. See the winner.
Frequently Asked Questions
- When is La Osera 2026?
- The 6th edition takes place on Saturday 16 May 2026 in Paterna del Madera (Albacete).
- What distances does La Osera offer?
- Four options: Marathon 45 km with 2,300m D+, Half Marathon 25 km with 1,300m D+, Sprint Trail 12 km with 600m D+ and Hiking 12 km.
- Where is Paterna del Madera?
- Paterna del Madera is a village in Albacete province, nestled between the Sierra del Segura and Sierra de Alcaraz. About 2 hours from Albacete city and 3 hours from Madrid.
- What is the course like?
- The routes follow the Verdenace Trail Network, 265 km of trails approved by the Castilla-La Mancha Mountain Sports Federation. The marathon reaches La Almenara (1,800m), La Cuerda Larga and Los Gallineros. Fast profile with technical sections.
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