Date, registration & deadlines
Jun 21, 2025 · Check official website
Local guides
Race data
| Modality | Distance | Elevation Gain | ITRA | Max Time | Price |
|---|---|---|---|---|---|
| Alto Rey Trail 21K | 21.7 km | D+ 1082m | - | 5h | - |
| Alto Rey Trail 11K | 11.6 km | D+ 586m | - | 3h | - |
What you need
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
12°C – 23°C
Average 18°C
Rain
30%
1.5 mm avg
Wind
17 km/h
max. average
Sunshine hours
13h
daily average
Gear recommendations
Bring a waterproof jacket (30% chance of rain)
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.
Salomon
Salomon Bonatti WP
Chaqueta cortavientos impermeable ultraligera (135 g). Costuras selladas, capucha ajustable y ventilación trasera. Se pliega en su propio bolsillo.
Sun protection essential (13h sunshine, up to 23°C)
Forecast for June 21
Real-time data from Open-Meteo
Alto Rey Trail
Alto Rey Trail is a mountain race held every year on the summer solstice from Bustares, a small village in the Sierra Norte de Guadalajara, Spain. Organised by the Asociación Cultural La Hincadera, the race summits Alto Rey peak (1,850m), one of the highest points in the province.
The course
Both distances start from Bustares and climb to the summit of Alto Rey via the Santa Coloma meadow. From the top, on clear days, you can see the towers of Madrid to the south and Moncayo to the north. The terrain combines mountain trails, oak forests, holm oak woodland and the characteristic dry stone walls of the area — Bustares has over 336 km of these traditional constructions.
The distances
The Alto Rey Trail 21K (1,082m D+) is a circular mountain half marathon that, after summiting Alto Rey, descends via Peña de los Gavilanes and Collado del Mediodía to Pradena de Atienza and Gascueña de Bornova before returning to Bustares. The Alto Rey Trail 11K (586m D+) shares the summit climb and descends through the Val de Cabañas valley directly to Bustares.
The solstice race
The 5:00 PM start on June 21 makes this a unique experience: the longest day of the year, with evening light sweeping across the Castilian mountains. The contrast between the heat of the early hours and the cool at higher elevations (up to 1,850m) demands smart hydration and gear management.
Bustares and the Sierra Norte
Bustares lies within the Sierra Norte de Guadalajara Natural Park, one of Spain’s most depopulated areas yet with exceptional natural and architectural heritage. The dry stone walls, centuries-old oak groves and the black architecture villages of the area make the trip an experience that goes well beyond the race itself.
Check our gear checklist to prepare for mountain conditions, and explore more races in Castilla-La Mancha.
Mandatory Gear
According to the official race regulations
360 Complete Pack
Alto Rey Trail 2025 Registration
InscripciónRegistration through RockTheSport. 4th edition organised by the Asociación Cultural La Hincadera de Bustares.
Browse all inscripciónTips
- • Online registration at rockthesport.com
- • Registration period: May 14 – June 19
- • Part of the Guadalajara Provincial Mountain Racing Calendar 2025
Where to stay for Alto Rey Trail
AlojamientoBustares is a small village in the Sierra Norte de Guadalajara. Limited rural accommodation options.
Browse all alojamientoTips
- • Rural houses in Bustares and nearby villages (Condemios, Albendiego)
- • Atienza (20 min): medieval town with more accommodation options
- • Sigüenza (40 min): Parador Nacional hotel and varied lodging
- • Book in advance: remote area with limited availability
Recommended gear for Alto Rey Trail
MaterialMountain terrain reaching 1,850m altitude. 5 PM start in June: warm in the early hours, potentially cool at higher elevations.
Salomon
Salomon Speedcross 6
La zapatilla de trail más versátil de Salomon, ideal para terrenos técnicos y barro. Agarre excepcional con suela Contagrip y amortiguación EnergyCell+.
Salomon
Salomon Soft Flask 150 ml
Vaso blando reutilizable de 150 ml para avituallamientos. Se pliega vacío, cabe en cualquier bolsillo. Válvula de mordida para beber sin parar.
Tips
- • Trail shoes with good grip: rocky trails and loose terrain
- • Poles optional but useful for the 21K climbs
- • Hydration pack: June in Guadalajara can exceed 30°C
- • Breathable technical shirt and cap for the afternoon sun
Nutrition for Alto Rey Trail
NutriciónAid stations in each village along the route and at the Alto Rey summit.
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.
Gourmet Latino
Bocadillo de Guayaba Gourmet Latino
Bocadillo de guayaba natural en formato individual de 26 g. Alto contenido en vitamina C y carbohidratos de rápida absorción. Textura sólida y envoltorio fácil de abrir, ideal para llevar en carrera. Sabor dulce intenso que aporta energía inmediata sin necesidad de agua.
Tips
- • The 11K can be completed with minimal extra nutrition
- • For the 21K: carry gels or bars for sections between villages
- • Extra hydration: the 5 PM start in June means heat
- • Electrolytes essential: heat plus altitude causes rapid dehydration
How to get to Bustares
TransporteBustares is in the Sierra Norte de Guadalajara, accessible by road from Madrid or Guadalajara.
Browse all transporteTips
- • From Madrid: ~2 hours via A-2 to Jadraque, then CM-110
- • From Guadalajara: ~1 hour via CM-101 and CM-110
- • From Soria: ~1h 30min via N-II and local roads
- • No public transport: car essential
Car rental for Alto Rey Trail
Alquiler de vehículoRural area with no public transport. Car needed to reach Bustares.
DRIVALIA
DRIVALIA Alquiler de vehículos por Suscripción CarCloud Country Plus
Suscripción de alquiler de vehículos tipo SUV/crossover, ideal para llegar a carreras de montaña por carreteras rurales y pistas forestales.
DRIVALIA
DRIVALIA Alquiler de vehículos por Suscripción CarCloud City
Suscripción de alquiler de vehículos urbanos, perfecta para desplazarte a carreras con buenos accesos por autovía y carretera convencional.
Tips
- • Guadalajara city also has rental offices
- • Mountain roads in good condition but winding
Sports insurance for Alto Rey Trail
SeguroMountain race with technical sections and significant altitude.
Browse all seguroTips
- • Federation licence or day insurance required
- • Nearest hospital in Sigüenza or Guadalajara city
- • Mountain rescue coverage recommended
Body care for Alto Rey Trail
Cuidado corporalRace on the summer solstice with an afternoon start. The combination of heat, altitude and sun exposure requires specific protection.
Buff
Buff CoolNet UV+
Tubular multifunción con protección UV UPF 50+ y tecnología de refrigeración. Se puede usar como cuello, cinta de cabeza, balaclava o muñequera. El tejido CoolNet refleja los rayos UV y enfría la piel por evaporación.
Julbo
Julbo Aerospeed
Gafas de sol deportivas con lentes fotocromáticas Reactiv que se adaptan automáticamente a las condiciones de luz (categoría 1 a 3). Diseñadas para trail running con patillas antideslizantes y ventilación integrada.
Tips
- • Sunglasses: the race runs entirely in afternoon sun
- • UV buff or cap for neck and head protection
- • Vaseline on chafe-prone areas: heat increases friction
Sun protection for Alto Rey Trail
Protección solarThe summer solstice is the longest day of the year. Altitude (up to 1,850m) intensifies UV radiation. Sun protection is essential.
ISDIN
ISDIN Fotoprotector Fusion Water SPF 50+
Protector solar facial ultraligero de fase acuosa con SPF 50+. Textura fluida que se absorbe al instante sin dejar residuo graso, ideal para aplicar durante la carrera. Resistente al agua y al sudor.
Piz Buin
Piz Buin Mountain SPF 50+
Crema solar de montaña con SPF 50+ formulada para condiciones extremas de altitud. Protección extra contra la radiación UV intensificada y el viento frío. Textura rica que protege la piel de la deshidratación.
Sun Bum
Sun Bum Sunscreen Lip Balm SPF 30
Bálsamo labial con protección solar SPF 30 en formato stick. Hidrata y protege los labios de quemaduras solares, un punto que muchos corredores olvidan. Sabor a coco, sin parabenos.
Tips
- • SPF50+ mandatory: solstice + altitude = maximum UV radiation
- • Apply 30 minutes before the start and reapply at aid stations
- • Protect lips with SPF30+ balm
- • Summit areas are fully exposed with no shade
Frequently Asked Questions
- When is Alto Rey Trail held?
- Alto Rey Trail takes place on the summer solstice (June 21), starting at 5:00 PM from Bustares (Guadalajara, Spain).
- What distances does Alto Rey Trail offer?
- Two distances: 21K (mountain half marathon) with 1,082m elevation gain and 11K with 586m elevation gain. Both are circular routes from Bustares.
- What is the course like?
- Both routes summit Alto Rey peak (1,850m) via mountain trails, oak forests and holm oak woodland. The 21K passes through Pradena de Atienza and Gascueña de Bornova before returning to Bustares.
- How to get to Bustares?
- Bustares is in the Sierra Norte de Guadalajara. From Madrid it's about 2 hours via the A-2 and CM-110. From Guadalajara city, approximately 1 hour.
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