Race preparation guide

Zegama-Aizkorri 2026 Guide: the Basque Country's legendary skyrace

Zegama-Aizkorri is the most watched race on the global skyrunning calendar. Over 42 km and 2,298 m of climbing above the Spanish Basque Country, it is an event unlike any other: an entire village mobilised, a festival atmosphere, a technical ridge-top course and a field of champions that makes it one of the most compelling spectacles in high-level mountain running.

Edition
17 May 2026
Distance
42 km
Elevation +
2,298 m
Location
Zegama, Basque Country, Spain
Difficulty
World-class skyrace

Race overview

The Zegama course circles the Aizkorri massif. From the village, it climbs sharply to the ridgeline, crossing several summits including the Aizkorri at 1,528 m — the highest point in the Spanish Basque Country — before long technical descents bring it back. The race is known as much for its spectator experience as for its athletes: thousands of supporters crowd the ridges to cheer runners at close range.

That format sets Zegama apart. It is not an endurance ultra in the accumulative sense: 42 km is a distance managed at a much higher intensity than a 100 km. The terrain demands precision, very strong descending and good reading of non-runnable sections. For the majority of participants, Zegama is an opportunity to test yourself on a world-class skyrace format in a uniquely convivial Basque setting.

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What you actually need to prepare

Preparation for Zegama should include uphill speed work, technical descending on wet and rocky terrain, and the capacity to hold a high-intensity effort for several hours. Because the course is shorter but more intense than a classic ultra, training calls for more intensity and less raw volume than a 100 km build-up. The point is not to carry much, but to run fast while still respecting a minimalist safety list. With a well-marked course and a competitive format, the emphasis is on performance quality and precise movement.

Mandatory gear to double-check

Zegama asks for far less equipment than a big alpine ultra, but the official list still matters. The game is to stay light without getting sloppy on safety.

  • Chaqueta cortavientos: a light windproof or waterproof jacket according to the year's wording.
  • Vaso para avituallamiento líquido: your own cup or container for liquid aid stations.
  • Manta térmica: an emergency blanket.
  • Trail shoes with trustworthy grip for mud and wet rock.

The official Zegama-Aizkorri regulations are the source of truth, especially for the exact wording around the jacket requirement.

Logistics to solve early

Zegama is a village in the Gipuzkoa province, easily reachable from San Sebastián (Donostia). By car from France, the drive from Hendaye or Bayonne takes about one hour via the A8 motorway into the Spanish Basque Country. By public transport, Renfe trains run from San Sebastián to Beasain, then a local connection reaches Zegama. The race weekend draws thousands of visitors and the village is overwhelmed: accommodation in Zegama itself is extremely limited. San Sebastián, Tolosa and Ordizia are the practical bases.

Official logistics are centred on Zegama village. Bib pickup, the race village and shuttle-return information for remote finish zones are all published on the official site zegama-aizkorri.com. The organisation is well-established and communication is generally excellent: joining the newsletter list early ensures you receive registration and rule-update notifications.

Transport

The simplest flight access is through Bilbao or San Sebastián. After that, the cleanest logic is to reach Beasain by rail or road, then solve the final short stretch to Zegama.

Driving from the French border is fairly straightforward via the A8 and Basque inland roads. On public transport, Beasain is the real logistics hinge: once that is solved, the rest becomes much lighter.

Accommodation

Zegama itself is tiny and fills immediately. Ordizia, Beasain, Segura and even San Sebastián quickly become the realistic bases depending on budget and how much race-morning transfer you accept.

The main criterion is not only price. You need reliable sleep, easy bib-pickup access and a race morning that does not become a stress test before the first climb.

Race week timeline

D-2 / D-1

Reach the Basque Country, collect the bib, read the weather carefully and prepare a very simple kit for fast running on potentially wet ground.

Pre-start

Solve parking or village access early, warm up without overdoing it and keep the opening climbs on controlled intensity rather than excitement.

Mid-race

Respect the steep sections where efficient hiking is faster, re-accelerate when terrain opens, and stay focused on traction during the descents.

Post-race

Have dry clothes, simple food and a clean route back to your base ready, because the village stays packed into the afternoon.

Turn the guide into action

Zegama-Aizkorri is an objective that stays with you. If you arrive with preparation that matches this terrain, have your travel to the Basque Country organised and are ready to enjoy the spectacle as much as your own race, you will experience one of the most unique events in world trail running.

Zegama-Aizkorri FAQ

Is Zegama really as slippery as its reputation says?

Yes, especially in wet weather. This is a race where shoe choice and descending quality on mud and rock matter a lot.

Should you prepare Zegama like a road marathon or like an ultra?

Neither exactly. The total volume is below an ultra build, but the effort is still mountain-specific: steep climbing, technical descending and high intensity.

What is the most practical airport?

Bilbao is often the easiest for international flights. San Sebastián is excellent if the schedule works and can reduce the final transfer slightly.

Where is the best place to stay?

Ordizia and Beasain are strong compromises. Zegama itself is scarce, while San Sebastián works if you accept more road time on race morning.

Is the mandatory kit heavy?

No, it stays light compared with an alpine ultra. But the items published by the organiser still have to be present, and shoe choice remains a serious decision.

Why use the TrailCompanion Prep for Zegama?

Because it helps structure a short but demanding objective: uphill-speed work, technical descending, Basque travel logistics and a clean race routine inside one plan.

TrailCompanion

Ready to prepare for this race? Create your Prep on TrailCompanion — logistics, gear and race planning in one place.

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