Hiru Haundiak: the great Basque mountain traverse

Plan your race pace

Hiru Haundiak occupies a place of its own on the Spanish trail map: it is not just a long race, but a mountain traverse with identity, history, and symbolic weight that goes far beyond the race bib. The event links Gorbea, Anboto and Aizkorri, three emblematic peaks in Euskadi, on a course of around 101 kilometers and more than 10,000 meters of accumulated elevation gain, a combination that demands endurance, mental strength, and a fine reading of the terrain.

The 2025 edition preserves that legendary character and adds a significant new feature: the route changes direction, from east to west, with the start in Araia and the finish in Murgia. The challenge remains the same in essence, but the sequence of mountains, the intermediate sections, and the way effort is managed take on a different nuance, almost as if an old route were being rewritten with a different cadence. In a race like this, the details matter as much as the overall figure.

A race that defines the landscape of Basque trail running

The importance of Hiru Haundiak is easier to understand when viewed in context. It was born in 1987 at the hands of the Manuel Iradier Excursionist Society and went on to become one of the pioneering events of long-distance mountain racing in Spain. Its value lies not only in its toughness; it also lies in having established a way of understanding the mountains as a shared route, as a connecting thread between territories, and as a sporting experience with a very distinct identity.

In the Basque Country, this event functions almost like a sporting rite. Every two years it brings together runners who are not only looking to rack up kilometers, but to cross a landscape filled with cultural and natural references. Gorbea, Anboto and Aizkorri are not just high points on an elevation profile; they are mountains with their own names, familiar to anyone who follows mountain running in the area, and that turns the race into something closer to an epic traverse than a conventional competition.

Its scale also matters. The 24-hour time limit and an elevation gain of around 10,610 meters place the race in territory reserved for very well-prepared legs and highly intelligent effort management. The number of entries usually falls far short of demand, and in several editions access has been determined by lottery, a sign of how much prestige the event has gained among mountain-running followers.

The three mountains that give meaning to the challenge

The sporting structure of the race revolves around three peaks that summarize much of the emotional geography of Basque trail running. Gorbea, at 1,481 meters, is the highest point in Araba; Anboto, at 1,331 meters, dominates Bizkaia; and Aizkorri, at 1,523 meters, represents Gipuzkoa. Each one brings a different personality to the whole, like three acts of the same play.

The effect of linking them in a single day is not merely cumulative. The runner moves in and out of valleys, ridges, forests, and hillsides that change texture with the light, the humidity, and fatigue. There are sections where the pace becomes lighter and others where the terrain forces movement to be conserved. In a race of this caliber, the mountain is in charge and the athlete negotiates with it every climb, every descent, and every transition.

The sequence between peaks also has a symbolic reading. By linking the three historic territories, the race reinforces an idea of geographical and cultural continuity that explains much of its magnetism. It is not about adding isolated mountains together, but about sewing them into a single route, joining peaks that seem distant on the map but that the race turns into one continuous line of effort.

The 2025 edition and the change in direction of the route

The XXIV edition introduces an important modification: the course is tackled from east to west. The start is in Araia and the finish in Murgia, a change that alters the usual sequence of the day and forces a fresh reading of the race. In mountain running, a variation like this is not cosmetic; it can change sensations, the distribution of effort, and the way the major sections of the course are approached.

The change in direction also affects the perception of the route. There are races in which the direction is part of their character, and something similar happens here. Reversing the direction does not erase the essence, but it does reorder the experience. The mountain itself seems to speak with a different accent when traversed in reverse, and that adds technical and narrative interest to a race that already had plenty of substance on its own.

The organization announced the new layout as part of an edition with adjustments in several sections compared with the previous year. In a 101-kilometer race, specific changes can have a greater impact than the map suggests: a ramp, a narrow passage, a long descent, or a transition section can condition the strategy for hours. That is where much of Hiru Haundiak’s appeal lies for the long-distance runner.

Distance, elevation gain, and time limit: the true scale of the challenge

The basic data is enough to understand the scale of the event: 101 kilometers, around 10,610 meters of accumulated elevation gain, and a maximum of 24 hours to complete the route. On paper it sounds like a demanding ultra; on the ground, the combination is even harsher because the elevation gain is not concentrated in a single climb, but spread across a very long day.

That distribution turns every decision into something almost tactical. Starting too fast can take its toll in the second half; holding back too much can leave you trapped in a fatigue you never fully escape. The race requires a very delicate balance between moving forward and conserving energy, between running when the terrain allows it and walking when the gradient turns every stride into an energy bill.

That is why pace management is often the great invisible factor. Endurance alone is not enough; you need to sustain constant attention for many hours, fuel properly, drink wisely, and avoid the small mistakes that, when added together, drain the legs. In an event this long, the clock is as important as the mountain.

A route that blends natural heritage and athletic toughness

One of the reasons Hiru Haundiak draws so much attention is its ability to integrate sport and landscape without one overshadowing the other. The route crosses very recognizable natural environments in Euskadi and gives continuity to mountains that are part of the collective memory of the area. That combination of beauty and demand gives it a personality that does not depend solely on the stopwatch or the rankings.

In a race like this, the visual experience carries real weight. The runner not only suffers, but also observes: open slopes, forest trails, exposed ridges, abrupt weather changes, and horizons that expand or narrow depending on the hour. Fatigue turns every image into something sharper, almost more physical. The mountain is not scenery; it is the very stage of the effort.

That landscape component helps explain why the race retains such strength year after year. For many participants, Hiru Haundiak is an event where the result matters, but does not explain everything. There is a dimension of belonging, of continuity with a deeply rooted mountain tradition, that places this traverse in a different category from other ultras more focused on sporting spectacle.

Organization, participants, and the difficulty of getting a bib

The race is organized by the Manuel Iradier Excursionist Society, an organization with deep roots in Basque mountaineering and a track record that explains the solidity of the project. Over the years, Hiru Haundiak has established itself as a reference event, supported by institutions, clubs, and collaborators who sustain a complex logistics operation behind a very simple public image: a long line of runners moving along the mountain range.

Interest in taking part usually far exceeds the number of available spots. In previous editions, there has been talk of 1,700 registered participants after a lottery, a figure that reveals the race’s drawing power. It is not just another ultra on the calendar; it is a race with its own demand, associated with a reputation built over time and with a very recognizable organization.

Bib distribution, checkpoints, aid stations, mandatory gear, and cutoff times are part of an infrastructure that is rarely seen from the outside, but which supports the entire event. In long-distance mountain races, safety and course control are just as decisive as the level of the runners, and in Hiru Haundiak that logistical dimension has become part of the race’s identity.

The history of a race that set a precedent

Talking about Hiru Haundiak also means talking about part of the recent history of trail running in Spain. When it was founded, mountain races still did not have the media presence or calendar density they have today. That is why its continuity matters so much: it helped mark a path, showed that long-distance mountain racing had room to grow, and established a standard that other races would later look to.

Its experience gives it an authority that does not depend on trends. While many races appear and disappear quickly, this event has managed to preserve a stable personality, with its own story updated every two years. That regularity makes it a kind of compass for understanding how mountain sports have evolved in Euskadi and, by extension, in much of Spain.

In addition, the race has left a cultural footprint reflected in videos, reports, photographs, and archival material. There are races that survive in memory because of a particularly hard edition or memorable weather; Hiru Haundiak has accumulated both, as well as a narrative of resilience, community, and respect for the mountain that is now part of its sporting brand.

What the qualifying classification reveals and the required level

One of the details that best defines the race’s prestige is its status as a qualifying event with 4 ITRA points. That fact places it within the mountain-racing circuit at a level of demand that is not given lightly. In the trail-running world, ITRA points are a well-known reference for runners and organizers to measure a race’s difficulty and relevance.

The value is not just in the label, but in what it implies: Hiru Haundiak is not an introductory experience, but a challenge for those who already have experience in ultra-distance or prolonged mountain races. The accumulated difficulty, elevation gain, and duration mean the participant profile has to be very complete, with endurance, downhill technique, and the ability to hold up mentally for hours.

That combination also explains why following results, certificates, photos, and standings generates so much interest after each edition. The race leaves a measurable mark, but also an emotional one. Those who finish it usually remember not only the final time, but also the sections, the fog, the night, the fatigue, and the sequence of peaks as if it were a long and deeply physical story.

A benchmark that keeps growing without losing its mountain spirit

Hiru Haundiak has achieved something uncommon: it has grown without losing its shape. It remains a tough, technical race deeply tied to the territory, while at the same time adapting to new editions, changes in direction, and logistical needs without losing its essence. That ability to renew itself explains its relevance in an increasingly competitive calendar.

The presence of institutional support, specialized media, and growing attention on social networks and results platforms confirms that the race is no longer just a gathering of mountain enthusiasts. It is also a sporting event with reach, capable of attracting attention beyond the local environment because it offers a very clear picture of what trail running means when it keeps its roots, memory, and real demands.

At its core, that is why the race continues to attract interest: it combines the toughness of an ultra with a history that can be read almost like a map of Basque mountaineering. Between Gorbea, Anboto and Aizkorri there are not just kilometers; there is a way of understanding effort, territory, and the continuity of a tradition that does not need artifice to remain relevant.