Photo: Ultra Trail Bosques del Sur (opens in a new tab)Cazorla
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
Your checklist for Ultra Trail Bosques del Sur
What you need, category by category, with our #1 pick for this race. Tick what you already have.
0 of 12 ready
Swipe to see all 13 categories
Swipe to see all 13 categories
GPS watch
Done, you already have it
View on Amazon →(opens in a new tab)Suunto Run 2
Very light: 35 g case
Downside: 24 h of GPS: short for ultras over 100 km
Gear
Trail shoes with good grip for forest paths and rocky sections
Done, you already have it
View on Amazon →(opens in a new tab)Hoka Speedgoat 7
Max Hoka cushioning: protects your legs over long distances
Downside: High stack: less stable for those who want more ground feel
Nutrition
The Ultra has 10 aid stations plus the finish with solid food and drinks
Done, you already have it
View on Amazon →(opens in a new tab)Gourmet Latino Guava Sandwich
100% natural, no artificial ingredients
Downside: Very sweet flavour, can get tiring with repeated intake
Sun Protection
Reapply every 2 hours, even on cloudy days
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
Wear a visor or cap to shield your face during the hottest hours
Done, you already have it
View on Amazon →(opens in a new tab)Julbo Aerospeed
Photochromic lenses: adapt from forest to summits
Downside: Higher price compared to non-photochromic glasses
Car Rental
Park roads are mountain roads but in good condition
Done, you already have it
View on Amazon →(opens in a new tab)DRIVALIA CarCloud Country Plus
Mandatory · Ultra 70K
Headlamp
Mandatory for the Ultra, starts at 7:00 AM with midnight cutoff
Done, you already have it
View on Amazon →(opens in a new tab)Petzl Actik Core
Mandatory
Windproof jacket
Essential at higher elevations in the park
Done, you already have it
View on Amazon →(opens in a new tab)Salomon Bonatti WP
Mandatory
Emergency whistle
Done, you already have it
View on Amazon →(opens in a new tab)Fox 40 Classic
Mandatory
Emergency blanket
Done, you already have it
View on Amazon →(opens in a new tab)Lifesystems Thermal Blanket
Mandatory
Hydration vest
Minimum 1L capacity
Done, you already have it
View on Amazon →(opens in a new tab)Salomon ADV Skin 12
Mandatory
Charged mobile phone
With sufficient battery and emergency numbers saved
Done, you already have it
View on Amazon →(opens in a new tab)Generic Running Waist Pack with Phone Pocket
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
HeadlampUltra 70K
Mandatory for the Ultra, starts at 7:00 AM with midnight cutoff
Windproof jacket
Essential at higher elevations in the park
Emergency whistle
Emergency blanket
Hydration vest
Minimum 1L capacity
Charged mobile phone
With sufficient battery and emergency numbers saved
Items tagged “Mandatory” are in the checklist above, with a recommended product.
Race data
Terrain
Trail
Difficulty
Advanced
Distance
5 modalities
Ultra 70K
Price: 90 EUR
- Distance
- 70 km
- Elevation Gain
- D+ 3700m
- Max Time
- 17h
- ITRA
- 3 pts
Marathon 42K
Price: 55 EUR
- Distance
- 42 km
- Elevation Gain
- D+ 2438m
- Max Time
- 10h
- ITRA
- 1 pts
Half 21K
Price: 40 EUR
- Distance
- 21 km
- Elevation Gain
- D+ 1190m
- Max Time
- 5h
- ITRA
- -
Mini 10K
Price: 25 EUR
- Distance
- 10 km
- Elevation Gain
- D+ 600m
- Max Time
- 3h
- ITRA
- -
Kids 4K
Price: 5 EUR
- Distance
- 4 km
- Elevation Gain
- D+ 100m
- Max Time
- 1h 30min
- ITRA
- -
| 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 |
Will your watch battery last the ~16 h of Ultra Trail Bosques del Sur?Worked out for the longest course (70 km). See which watches reach the finish with GPS on and which die on the way.Check my watch Check my watchUltra 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.
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
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
Weather forecast from Open-Meteo (may change until race day)
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.
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.
Tips
- •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.
Tips
- •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.
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
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.
Best GPS Watches with Offline Maps 2026: Value Comparison
The best GPS watches with offline maps in 2026, ranked by value: Amazfit T-Rex 3, Suunto Race 2, Garmin Forerunner 570, Instinct 3 AMOLED, Coros Apex 2 Pro, Suunto Vertical 2 and Garmin Fenix 8. Maps vs breadcrumbs, the cheapest watch with maps and which to choose for your use.
Nutrition for Ultra Trail Bosques del Sur
NutritionNutrition strategy for a trail race in a warm Mediterranean climate with frequent aid stations.
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.
Tips
- •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.
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.
Tips
- •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.
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
Best caps and visors for trail running 2026: sun protection on race day
Visor or cap for running? Visors vent more heat, caps protect your scalp from the sun. The best caps, visors and UV buffs for trail running in 2026, with a verdict by race type.
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 compared 7 SPF 50 sweat-proof picks — creams, sticks and a lip balm — on heat, altitude UV and sweat resistance. 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.
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 Hygiene and Body Care Products for Trail Running 2026: complete comparison
Best hygiene and body care products for trail running 2026: foot deodorant, menstrual cup, anti-chafe balm, sun protection, anti-blister patches, post-race recovery and portable hygiene kit for ultra trail.
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.
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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