Photo: Asociación Cultural La Hincadera / Source (opens in a new tab)Bustares, Guadalajara
Alto Rey Trail
Saturday, 19 June 2027estimated date
Alto Rey Trail 21K
21.7km D+ 1082m
Alto Rey Trail 11K
11.6km D+ 586m
Your checklist for Alto Rey Trail
What you need, category by category, with our #1 pick for this race. Tick what you already have.
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Mandatory Gear
According to the official race regulations
Charged mobile phone
With sufficient battery and emergency numbers saved
Reusable cup
Minimum 200ml for aid stations
Items tagged “Mandatory” are in the checklist above, with a recommended product.
Race data
Terrain
Mountain
Difficulty
Intermediate
Distance
2 modalities
Alto Rey Trail 21K
- Distance
- 21.7 km
- Elevation Gain
- D+ 1082m
- Max Time
- 5h
Alto Rey Trail 11K
- Distance
- 11.6 km
- Elevation Gain
- D+ 586m
- Max Time
- 3h
| Modality | Distance | Elevation Gain | Max Time |
|---|---|---|---|
| Alto Rey Trail 21K | 21.7 km | D+ 1082m | 5h |
| Alto Rey Trail 11K | 11.6 km | D+ 586m | 3h |
Will your watch battery last the ~5 h of Alto Rey Trail?Worked out for the longest course (21.7 km). See which watches reach the finish with GPS on and which die on the way.Check my watch Check my watchAlto Rey Trail 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
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)

Asics
Asics Gel-Trabuco 14 GTX
A best-selling beginner trail shoe: GEL cushioning, good stability and a waterproof GORE-TEX membrane. Versatile and reliable for training on mixed terrain in any weather.

Berghaus
Berghaus Paclite 2.0 GTX
Waterproof jacket with a Gore-Tex Paclite membrane (around 330 g). Fully waterproof with taped seams, fixed adjustable hood, storm flap behind the zip and cuff adjustment. Packs down small in a vest. Heavier than a pure running hardshell, but it meets the waterproof-breathable membrane requirement in race rules and is the affordable route into Gore-Tex.

Brooks
Brooks Cascadia 20 GTX
The Cascadia 20 with a GORE-TEX membrane: stability and protection for rocky mountain terrain, keeping the foot dry on cold, rainy days.

Gore Wear
Gore Wear C5 GORE-TEX Glove
Glove with a fully waterproof, windproof GORE-TEX membrane and light insulation. The pick for running in snow, sleet or heavy rain while keeping your hand dry.

Gore Wear
Gore Wear M GORE-TEX Thermo Glove
Warmer variant of the Gore Wear C5 GORE-TEX: the same fully waterproof, windproof membrane, with extra thermal lining for intense cold on top of snow or rain. The pick when the problem isn't just water, but water AND hard cold at once.

Gore Wear
Gore Wear R7 GTX Shakedry
Ultralight Gore-Tex Shakedry waterproof jacket (110 g). Full waterproofing without an inner membrane, highly breathable. The benchmark for mountain runners.

Nike
Nike Pegasus Trail 5 GORE-TEX
The best-selling gateway trail shoe: comfortable, cushioned and versatile for moving from road to trail. Waterproof GORE-TEX version, perfect for beginners and easy runs on mixed terrain.

Salomon
Salomon Bonatti Pro Waterproof Glove
Lightweight waterproof glove built for running, not just standing still in the snow: a waterproof membrane with more dexterity and less bulk than a thick membrane glove, for sustained rain without giving up handling gels or poles.

Salomon
Salomon Bonatti WP
Ultralight waterproof windproof jacket (135 g). Taped seams, adjustable hood and back ventilation. Packs into its own pocket.

Salomon
Salomon Speedcross 6 GTX
The Speedcross 6 with a GORE-TEX membrane: the same aggressive 5 mm lugs for mud and soft ground, now waterproof for winter, rain and snow.

Sealskinz
Sealskinz Waterproof Lightweight Glove
Lightweight waterproof glove from a brand that specializes in outdoor sport waterproofing. A solid middle ground between a thin windproof glove and a thick membrane glove: genuinely waterproof without the bulk or price of the Gore C5.

Shokz
Shokz OpenRun
Open-ear bone conduction headphones with IP67 rating: they take rain, mud and a rinse under the tap. Up to 8 h of battery and quick charge (10 min for 1.5 h). The most rugged pick of the range for training in bad weather.

TRIWONDER
TRIWONDER Waterproof Trail Gaiters
Waterproof, breathable low gaiters for trail running, hiking and mountain use. Under-shoe strap and adjustable elastic band. A budget-friendly alternative to premium technical brand gaiters.
Sun protection essential (13h sunshine, up to 23°C)
Forecast for 19 June
Weather forecast from Open-Meteo (may change until race day)
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.
360Complete Pack
Alto Rey Trail 2025 Registration
RegistrationRegistration through RockTheSport. 4th edition organised by the Asociación Cultural La Hincadera de Bustares.
Tips
- •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
AccommodationBustares is a small village in the Sierra Norte de Guadalajara. Limited rural accommodation options.
Tips
- •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
GearMountain terrain reaching 1,850m altitude. 5 PM start in June: warm in the early hours, potentially cool at higher elevations.
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

Which shoes for Alto Rey Trail?
Which footwear fits based on the race's terrain and weather

Which GPS watch for Alto Rey Trail?
Which watch has the battery to last based on your estimated finish time
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Best trail running hydration vests 2026: 12 vests and packs compared. How many litres you need by distance, soft flasks vs reservoir, and fit.
Nutrition for Alto Rey Trail
NutritionAid stations in each village along the route and at the Alto Rey summit.
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
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How to get to Bustares
TransportBustares is in the Sierra Norte de Guadalajara, accessible by road from Madrid or Guadalajara.
Tips
- •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
Car RentalRural area with no public transport. Car needed to reach Bustares.
Tips
- •Guadalajara city also has rental offices
- •Mountain roads in good condition but winding
Sports insurance for Alto Rey Trail
InsuranceMountain race with technical sections and significant altitude.
Tips
- •Federation licence or day insurance required
- •Nearest hospital in Sigüenza or Guadalajara city
- •Mountain rescue coverage recommended
Body care for Alto Rey Trail
Body CareRace on the summer solstice with an afternoon start. The combination of heat, altitude and sun exposure requires specific protection.
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
Sun ProtectionThe summer solstice is the longest day of the year. Altitude (up to 1,850m) intensifies UV radiation. Sun protection is essential.
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
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 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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