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
Your checklist for La Osera
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
GPS watch
Done, you already have it
View on Amazon →(opens in a new tab)Garmin Forerunner 570
Full-color topo maps, a first for the Forerunner line
Downside: Shorter battery life than a Forerunner 965 with maps on
Gear
Trail shoes with good grip: mixed terrain with trails, ridges and technical sections
Done, you already have it
View on Amazon →(opens in a new tab)Nike Ultrafly
ZoomX foam: exceptional energy return inherited from the Vaporfly
Downside: High price (190 EUR)
Nutrition
45K: plan gels, bars and electrolytes for 5-8 hours of effort
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
SPF 50 sunscreen on face, neck, arms and legs
Done, you already have it
View on Amazon →(opens in a new tab)ISDIN Fusion Water Sunscreen SPF 50+
Ultralight texture, feels invisible on skin
Downside: Small format (50 ml), may run short on ultras
Body Care
Anti-chafe balm on friction areas: essential for the 45K
Done, you already have it
View on Amazon →(opens in a new tab)After Bite Xtra Gel
Immediate relief from processionary caterpillar irritation
Downside: Strong ammonia smell
Car Rental
Mountain roads in good condition but winding
Done, you already have it
View on Amazon →(opens in a new tab)DRIVALIA CarCloud Country Plus
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.
Race data
Terrain
Mountain
Difficulty
Advanced
Distance
4 modalities
Marathon 45K
Price: 38 EUR
- Distance
- 45 km
- Elevation Gain
- D+ 2300m
- Max Time
- -
Half Marathon 25K
Price: 28 EUR
- Distance
- 25 km
- Elevation Gain
- D+ 1300m
- Max Time
- -
Sprint Trail 12K
Price: 25 EUR
- Distance
- 12 km
- Elevation Gain
- D+ 600m
- Max Time
- -
Hiking 12K
Price: 25 EUR
- Distance
- 12 km
- Elevation Gain
- D+ 600m
- Max Time
- -
| 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 |
Will your watch battery last the ~11 h of La Osera?Worked out for the longest course (45 km). See which watches reach the finish with GPS on and which die on the way.Check my watch Check my watchGear up for La Osera
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
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
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.
Forecast for 15 May
Weather forecast from Open-Meteo (may change until race day)
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
La Osera 2026 Registration
Registration6th edition organised as a non-profit. All income goes entirely towards covering event costs.
Tips
- •Online registration at inscripciones.cronomancha.com
- •Marathon 45K: €38, Half Marathon 25K: €28, Sprint Trail / Hiking 12K: €25
- •Registration deadline: 8 May 2026
- •Post-race OseraFest included
Where to stay for La Osera
AccommodationPaterna del Madera is a small mountain village. Limited options in town, more variety in Riópar and Alcaraz.
Tips
- •Rural houses in Paterna del Madera and the Sierra del Segura area
- •Riópar (15 min): rural accommodation near the Nacimiento del Río Mundo
- •Alcaraz (30 min): more accommodation options
- •Albacete city (2 hours): the widest range of options
Gear for La Osera
GearMountain terrain in the Sierra del Segura and Sierra de Alcaraz. Approved trails, ridges and river crossings.
Tips
- •Trail shoes with good grip: mixed terrain with trails, ridges and technical sections
- •Poles highly recommended for the 45K and 25K
- •Hydration vest essential for long distances
- •The 45K reaches 1,800 m: warm clothing and windbreaker are a must
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
Best trail running poles 2026: Black Diamond, Leki and Komperdell compared. Carbon vs aluminium, folding length, technique and how to pick your size.
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.
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.
Nutrition for La Osera
NutritionThe 45K with 2,300 m D+ demands a serious nutrition strategy. The 25K also requires planning.
Tips
- •45K: plan gels, bars and electrolytes for 5-8 hours of effort
- •25K: carry supplies for 2-4 hours
- •Aid stations on course: check locations on the official website
- •Full breakfast 2-3 hours before the start (8:00 AM)
How to get to Paterna del Madera
TransportPaterna del Madera is deep in the mountains, between the Sierra del Segura and Sierra de Alcaraz.
Tips
- •From Madrid: ~3 hours via A-31 to Albacete then CM-412 towards the mountains
- •From Albacete: ~2 hours via CM-412
- •From Murcia: ~2h 30min via A-30 and CM-412
- •Start at Parque Adolfo Suárez in Paterna del Madera
Car rental for La Osera
Car RentalCar essential to reach Paterna del Madera. No direct public transport.
Tips
- •Mountain roads in good condition but winding
- •No direct public transport to Paterna del Madera
Sports insurance for La Osera
InsuranceMountain race on demanding terrain. Federation licence or day insurance recommended.
Tips
- •FDMCM/FEDME licence or day insurance recommended
- •The 45K runs through remote high-mountain areas
- •Nearest health centre in Riópar
Body care for La Osera
Body CareLong-duration effort on mountain terrain. The 45K demands specific preparation.
Tips
- •Anti-chafe balm on friction areas: essential for the 45K
- •Technical anti-blister socks
- •River crossings: carry spare socks if possible
- •May in the mountains: watch for ticks in scrubland areas
Sun protection for trail in May
Sun ProtectionMay in the Sierra del Segura has high UV radiation, especially on ridges and open areas.
Tips
- •SPF 50 sunscreen on face, neck, arms and legs
- •Lip balm with SPF
- •Cap or visor mandatory for the 45K
- •Reapply at aid stations for efforts of more than 4 hours
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.
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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