Photo: Ultra Trail Bosques del SurCazorla
Ultra Trail Bosques del Sur
Saturday, 29 May 2027
Ultra 70K
70km D+ 3700m
Marathon 42K
42km D+ 2438m
Half 21K
21km D+ 1190m
Mini 10K
10km D+ 600m
Kids 4K
4km D+ 100m
Ultra Trail Bosques del Sur 2027 registration opens on
Save the date and get your gear ready in the meantime.
Race data
| Modality | Distance | Elevation Gain | ITRA | Max Time | Price |
|---|---|---|---|---|---|
| Ultra 70K | 70 km | D+ 3700m | 3 pts | 17h | 90 EUR |
| Marathon 42K | 42 km | D+ 2438m | 1 pts | 10h | 55 EUR |
| Half 21K | 21 km | D+ 1190m | - | 5h | 40 EUR |
| Mini 10K | 10 km | D+ 600m | - | 3h | 25 EUR |
| Kids 4K | 4 km | D+ 100m | - | 1h 30min | 5 EUR |
Ultra Trail Bosques del Sur requires mandatory gear: get it sorted early
Buying guides with the best value for money, picked for this kind of terrain.
Best Value Trail and Mountain GPS Watches 2026: Comparison and Buying Guide
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Best Trail Running Hydration Vests 2026: Comparison and Buying Guide
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The 6 Best Trail Running Socks 2026
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Best caps and visors for trail running 2026: sun protection on race day
See comparisonWhat you need
Salomon
Salomon Speedcross 6
Gourmet Latino
Bocadillo de Guayaba Gourmet Latino
ISDIN
ISDIN Fotoprotector Fusion Water SPF 50+
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
13°C – 25°C
Average 19°C
Rain
17%
0.6 mm avg
Wind
14 km/h
max. average
Sunshine hours
13h
daily average
Gear recommendations
Sun protection essential (13h sunshine, up to 25°C)
Forecast for 29 May
Real-time data from Open-Meteo
Ultra Trail Bosques del Sur
Ultra Trail Bosques del Sur is a trail running race through the Sierras de Cazorla, Segura y las Villas Natural Park, the largest protected natural area in Spain, spanning over 200,000 hectares of forests, gorges and mountain ridges.
The race starts from Plaza de la Constitucion in Cazorla and finishes at the Ruins of Santa Maria, in the old town of this charming village in the province of Jaen. Five distances for all levels, from the Kids 4K for young runners to the Ultra 70K for the most demanding athletes.
The Course
The trails of Bosques del Sur wind through one of the most impressive forest landscapes on the Iberian Peninsula. Runners will pass through:
- Ancient Laricio pine forests — Centuries-old specimens of Cazorla’s native pine
- Escaleruela Trail — A historic path carved into the rock
- Puerto del Tejo and Puerto de los Arenales — Mountain passes with panoramic views
- Puente de las Herrerias — A medieval bridge over the Guadalquivir River
- Cerrada de Utrero — A spectacular gorge carved by the Guadalquivir
The terrain mixes forest trails, technical rocky sections and some tarmac stretches. The elevation, while demanding, does not reach extreme altitude: the highest points sit around 1,800m.
Distances and Prices
Ultra Trail Bosques del Sur offers five distances spread across two weekends:
May 30, 2026:
- Ultra 70K — 3,700m D+, 17h time limit, 3 ITRA points. From 72 EUR (FEDME members) to 90 EUR.
- Marathon 42K — 2,438m D+, 10h time limit, 1 ITRA point. From 50 EUR to 55 EUR.
June 6, 2026:
- Half 21K — 1,190m D+, 5h time limit. From 35 EUR to 40 EUR.
- Mini 10K — 600m D+, 3h time limit. From 20 EUR to 25 EUR.
June 7, 2026:
- Kids 4K — A children’s race around the outskirts of Cazorla. A perfect introduction to the world of trail running for young athletes.
The Heat Factor
In late May, temperatures in Cazorla can exceed 30°C in the lower sections. Hydration and sun protection are absolutely critical, especially in the Ultra and Marathon. The pine forests provide shade over much of the course, but the exposed summit sections offer no cover. Plan your hydration with our hydration calculator to stay on top of your fluid needs in the heat.
Cazorla: More Than Just a Race
The Cazorla Natural Park is a top-tier nature destination. It is the source of the Guadalquivir River, home to one of the largest griffon vulture populations in Europe, and offers a spectacular network of hiking trails. Make the most of the days before or after the race to explore the area: the Cerrada de Elias gorge, the Tranco Reservoir and the source of the Guadalquivir are must-see stops.
The town of Cazorla itself, with its Yedra Castle and the Ruins of Santa Maria, is a destination worth several days of exploration.
Use our time estimator to plan your pacing for the Ultra 70K, and explore more trail races in Andalusia.
Mandatory Gear
According to the official race regulations
Mandatory for the Ultra, starts at 7:00 AM with midnight cutoff
Essential at higher elevations in the park
Minimum 1L capacity
360Complete Pack
Ultra Trail Bosques del Sur 2026 Registration
RegistrationRegistration opens on February 16 at 10:00 AM on the Time2Run platform. Places are limited to 450 runners per distance.
Browse all registrationTips
- •Registration opens on February 16, 2026 at 10:00 AM
- •Places limited to 450 runners per distance
- •Discount for FEDME and FADMES members
- •A valid medical certificate is mandatory
Where to Stay in Cazorla
AccommodationCazorla and the surrounding villages offer charming rural accommodation, from hotels to country houses and campsites.
Browse all accommodationTips
- •Cazorla town has the widest range of accommodation near the start
- •Rural houses inside the natural park are a charming option
- •Book well in advance, May-June is peak season in Cazorla
- •La Iruela, 2 km from Cazorla, has more affordable options
Recommended Gear for Bosques del Sur
GearMixed terrain of forest trails, technical sections and some tarmac. The late-May heat in Jaen is a key factor to consider.
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
- •Trail shoes with good grip for forest paths and rocky sections
- •Sun protection is essential: cap, sunscreen and sunglasses
- •Hydration vest or pack with at least 1.5L capacity for the Ultra
- •Headlamp mandatory for the Ultra 70K (starts at 7:00 AM, cutoff at midnight)
- •Poles recommended for the Ultra and Marathon
Which shoes for Ultra Trail Bosques del Sur?
Which footwear fits based on the race's terrain and weather
Which GPS watch for Ultra Trail Bosques del Sur?
Which watch has the battery to last based on your estimated finish time
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.
The 6 Best Trail Running Socks 2026
Compare the 6 best trail running socks in 2026: Compressport Pro Racing V3.0 Trail, Injinji Trail Midweight Crew, OrrinSports toe socks, Lurbel Desafío Four, Icebreaker Merino Hike+ and Compressport Full Socks Recovery. Toe socks vs regular, merino vs synthetic, and how to avoid blisters.
Nutrition for Ultra Trail Bosques del Sur
NutritionNutrition strategy for a trail race in a warm Mediterranean climate with frequent aid stations.
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.
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.
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
- •The Ultra has 10 aid stations plus the finish with solid food and drinks
- •The Marathon has 8 aid stations
- •Carry extra gels and electrolytes, the Jaen heat in May increases dehydration risk
- •Start drinking from the first kilometer, don't wait until you feel thirsty
How to Get to Cazorla
TransportCazorla is inland in the province of Jaen with no direct train connection. A car is the best option.
Browse all transportTips
- •Granada Airport (GRX) is a 2h drive via the A-44 and A-322
- •Malaga Airport (AGP) is a 3h drive via motorway
- •Nearest train station: Linares-Baeza (1h 15min drive)
- •ALSA buses from Jaen city and Ubeda with limited schedules
Car Rental in Jaen
Car RentalA rental car is practically essential to reach Cazorla and get around the natural park.
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
- •Park roads are mountain roads but in good condition
- •Take advantage to explore the natural park in the days before the race
Sports Insurance for Bosques del Sur
InsuranceRun with peace of mind with insurance that covers medical assistance and evacuation in the natural park.
Browse all insuranceTips
- •Liability insurance is required to participate
- •FEDME members already have insurance included
- •If you are not federated, the organization includes basic insurance with entry
Sun protection for Ultra Trail Bosques del Sur
Sun ProtectionLate May in Jaén means intense heat, especially on exposed sections above 1,500m where shade from the pine forests disappears. Temperatures can exceed 30°C in the lower valleys.
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
- •Reapply every 2 hours, even on cloudy days
- •The exposed summit sections above 1,500m offer no shade — apply generously before leaving the forest
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Best sunglasses for trail running 2026: photochromic, polarized and budget picks
The best sunglasses for trail running in 2026: mountain photochromic, budget-friendly polarized, interchangeable lenses and an entry-level option. Comparison and recommendations.
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.
Body care for Ultra Trail Bosques del Sur
Body CareProtect your eyes, head and neck from the Jaén sun during the long hours on exposed trails. A good visor and UV-blocking buff are essential.
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.
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.
Salomon
Salomon Cross Visor
Ultralight trail running visor with absorbent sweatband and breathable fabric. The visor shields the face from the sun without trapping heat like a closed cap, ideal for summer races.
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
- •Wear a visor or cap to shield your face during the hottest hours
- •A UV-protection buff keeps your neck and ears covered on exposed ridges
Best Massage Guns for Trail Running 2026: The 5 Top Picks Compared
Compare the 5 best massage guns for trail runners in 2026: Theragun Prime, Theragun Mini, Bob and Brad Q2 Mini, RENPHO with heat and cold, and Cecotec SkinCare. Amplitude, portability, noise, and price.
Best Recovery Gear for Trail Running 2026: Comparison & Buying Guide
Compare the best recovery products for trail running in 2026: TriggerPoint GRID, Theragun Mini, Compressport Full Socks Recovery, and Compex Ayre Recovery Boots. Foam rolling, percussion, compression, and pressotherapy.
Best Recovery Sandals for Trail Running 2026: Comparison & Buying Guide
Compare the best recovery sandals for trail running in 2026: OOFOS OOriginal Sport, HOKA Ora Recovery Slide 3, Crocs Mellow Recovery Slide, and Skechers GOrecover Refresh. What to put on your feet after the race.
Frequently Asked Questions
- When is Ultra Trail Bosques del Sur 2026?
- The Ultra 70K and Marathon 42K take place on May 30, 2026. The Half 21K and Mini 10K on June 6, and the Kids 4K on June 7.
- What distances does Ultra Trail Bosques del Sur offer?
- Five distances: Ultra 70K (3,700m D+), Marathon 42K (2,438m D+), Half 21K (1,190m D+), Mini 10K (600m D+) and Kids 4K for young runners.
- How much does it cost to enter?
- Prices for non-federated runners: Ultra 90 EUR, Marathon 55 EUR, Half 40 EUR, Mini 25 EUR. FEDME members get a discount (Ultra 72 EUR, Marathon 50 EUR, Half 35 EUR, Mini 20 EUR).
- When does registration open?
- Registration opens on February 16, 2026 at 10:00 AM through the Time2Run platform.
- How do you get to Cazorla?
- Cazorla is in the province of Jaen. The nearest airports are Granada (2h drive) and Malaga (3h drive). By car, take the A-322 from Ubeda. The nearest train station is Linares-Baeza.
- Is a medical certificate required?
- Yes, a valid medical certificate is required to participate in all competitive distances.
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