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Alto Rey Trail
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

See Garmin Instinct 3 AMOLED 45 mm at Amazon(opens in a new tab)
Mandatory kit for Alto Rey Trail: official list and what to buyWhat the organisers require and the gear you actually need. Nothing you do not.

Your checklist for Alto Rey Trail

What you need, category by category, with our #1 pick for this race. Tick what you already have.

0 of 8 ready

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  1. GPS watch

    Garmin Instinct 3 AMOLED 45 mm

    Onboard topo maps, unlike the Instinct 3 Solar

    Downside: Shorter battery life than the Instinct 3 Solar (no solar charging or MIP display)

    View on Amazon →(opens in a new tab)
  2. Gear

    Trail shoes with good grip: rocky trails and loose terrain

    Nike Ultrafly

    ZoomX foam: exceptional energy return inherited from the Vaporfly

    Downside: High price (190 EUR)

    View on Amazon →(opens in a new tab)
  3. Nutrition

    The 11K can be completed with minimal extra nutrition

    GU Energy Gel Original

    Fast absorption thanks to the carbohydrate blend

    Downside: Needs to be taken with water

    View on Amazon →(opens in a new tab)
  4. Sun Protection

    SPF50+ mandatory: solstice + altitude = maximum UV radiation

    ISDIN Fusion Water Sunscreen SPF 50+

    Ultralight texture, feels invisible on skin

    Downside: Small format (50 ml), may run short on ultras

    View on Amazon →(opens in a new tab)
  5. Body Care

    Sunglasses: the race runs entirely in afternoon sun

    Buff CoolNet UV+

    UPF 50+: blocks 98% of UV radiation

    Downside: UV protection decreases with wear after many washes

    View on Amazon →(opens in a new tab)
  6. Car Rental

    Guadalajara city also has rental offices

  7. Mandatory

    Charged mobile phone

    With sufficient battery and emergency numbers saved

    Generic Running Waist Pack with Phone Pocket

    View on Amazon →(opens in a new tab)
  8. Mandatory

    Reusable cup

    Minimum 200ml for aid stations

    Salomon Soft Flask 250 ml

    High-flow valve: quick sips without hard biting

    Downside: Pricier than generic Amazon flasks

    View on Amazon →(opens in a new tab)
  9. Trip logistics

    Registration, travel and insurance: what you should have sorted before race day.

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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

Visit official website(opens in a new tab)
  • 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
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

Alto 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

Rain

30%

Wind

17 km/h

Sunshine hours

13h

Gear recommendations

Bring a waterproof jacket (30% chance of rain)

Asics Gel-Trabuco 14 GTX

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.

View on Amazon →
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Berghaus Paclite 2.0 GTX

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.

View on Amazon →
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Brooks Cascadia 20 GTX

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.

View on Amazon →
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Gore Wear C5 GORE-TEX Glove

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.

View on Amazon →
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Gore Wear M GORE-TEX Thermo Glove

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.

View on Amazon →
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Gore Wear R7 GTX Shakedry

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.

View on Amazon →
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Nike Pegasus Trail 5 GORE-TEX

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.

View on Amazon →
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Salomon Bonatti Pro Waterproof Glove

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.

View on Amazon →
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Salomon Bonatti WP

Salomon

Salomon Bonatti WP

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

View on Amazon →
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Salomon Speedcross 6 GTX

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.

View on Amazon →
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Sealskinz Waterproof Lightweight Glove

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.

View on Amazon →
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Shokz OpenRun

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.

View on Amazon →
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TRIWONDER Waterproof Trail Gaiters

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.

View on Amazon →
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Sun protection essential (13h sunshine, up to 23°C)

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

Registration

Registration through RockTheSport. 4th edition organised by the Asociación Cultural La Hincadera de Bustares.

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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

Accommodation

Bustares is a small village in the Sierra Norte de Guadalajara. Limited rural accommodation options.

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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

Gear

Mountain terrain reaching 1,850m altitude. 5 PM start in June: warm in the early hours, potentially cool at higher elevations.

Browse all gear

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
Nike Ultrafly

Which shoes for Alto Rey Trail?

Which footwear fits based on the race's terrain and weather

→
Garmin Instinct 3 AMOLED 45 mm

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: Comparison and Buying Guide

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Nutrition for Alto Rey Trail

Nutrition

Aid stations in each village along the route and at the Alto Rey summit.

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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

Transport

Bustares is in the Sierra Norte de Guadalajara, accessible by road from Madrid or Guadalajara.

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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 Rental

Rural area with no public transport. Car needed to reach Bustares.

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Tips

  • •Guadalajara city also has rental offices
  • •Mountain roads in good condition but winding

Sports insurance for Alto Rey Trail

Insurance

Mountain race with technical sections and significant altitude.

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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 Care

Race on the summer solstice with an afternoon start. The combination of heat, altitude and sun exposure requires specific protection.

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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 Protection

The summer solstice is the longest day of the year. Altitude (up to 1,850m) intensifies UV radiation. Sun protection is essential.

Browse all sun protection

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
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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.

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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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