ESPAGNE · Aragon (Pyrenees)
Trail Valle de Tena Ultra 4K: 42.5km of the Hardest Terrain in the Spanish Pyrenees
Informations clés
Distance
43 km
Date
Droit d’inscription
70 EUR
€ / km
€1.65
Pyrenees village-to-ridge: some of the biggest climbs in Europe, rugged trails, and high-mountain scenery in Aragón.
Trail Valle de Tena Ultra 4K is the second most mountainous race in the DiscoverTrailRaces database of 390 European ultras — only one course on the continent packs in less flat terrain. Starting and finishing near the Pyrenean village of Panticosa in Aragón, the 4K covers 42.5km with 3,500m of ascent (82.35m per kilometre) through high-altitude terrain the race itself describes as some of the wildest points of the Pyrenean mountain range. The biggest single descent drops 1,367m at an average gradient of −13.17%. Average uphill gradient ranks 11th steepest out of 390 European ultras. A medical certificate is required. Entry runs €70–€80 depending on when you register. Unlike many races of this calibre, it has no sell-out history — an open door into one of Spain's hardest non-UTMB courses. Race day is 5 September 2026, with the historic Balneario de Panticosa thermal spa nearby for the recovery you will need.
Élévation et Terrain
Mètres totaux
3,500m
D+/KM
82.4m/km
Pour référence, le Tor des Géants 330 km a 73 D+/km.
Pente montante moyenne
18.7%
Pente descendante moyenne
-17.2%
Distribution du gradient de montée
| 2–5% | 2 km | |
|---|---|---|
| 5–10% | 2.4 km | |
| 10–15% | 3.3 km | |
| 15–20% | 4.1 km | |
| 20%+ | 7.2 km |
Profil de parcours
AnalysedDétail du terrain
| 42% | Montée |
|---|---|
| 6.6% | Plat |
| 51.4% | Descente |
Terrain
Ascensions
Principales montées
| Rank | Length | Elevation gain | Start km | Average gradient | Max gradient |
|---|---|---|---|---|---|
| 1 | 5.4 km · 1367 m gain starts km 1 · avg 25.3% · max 70.8% | ||||
| 2 | 5.3 km · 595 m gain starts km 33 · avg 11.3% · max 50% | ||||
| 3 | 6.8 km · 564 m gain starts km 11 · avg 8.3% · max 42% |
Principales descentes
| Rank | Length | Elevation drop | Start km | Average gradient | Max gradient |
|---|---|---|---|---|---|
| 1 | 8.5 km · 1254 m drop starts km 26 · avg -14.8% · max -43.3% | ||||
| 2 | 5.6 km · 735 m drop starts km 40 · avg -13.2% · max -45.2% | ||||
| 3 | 2.7 km · 725 m drop starts km 6 · avg -27% · max -58.5% |
Trail Valle de Tena Ultra 4K: 42.5km of the Hardest Terrain in the Spanish Pyrenees
Course Profile: Why the 4K Is the 2nd Most Mountainous Ultra in Europe▼
Is Trail Valle de Tena Ultra 4K a difficult race? Yes — it ranks 2nd most mountainous out of 390 European ultra trail races in the DiscoverTrailRaces database. Only one course has less flat terrain. The 4K covers 42.5km with 3,500m D+, averaging 82.35m of climbing per kilometre, and a medical certificate is required to enter.
The Route: Panticosa to the High Pyrenees and Back — What 3,500m D+ Looks Like▼
What does '4K' mean in the Trail Valle de Tena race name? The 4K refers to approximately 4,000m of D+ (elevation gain), which is the race's naming convention for all its distances: 8K (approximately 80km / 6,820m D+), 4K (42.5km), 2K (approximately 20km), and 1K (approximately 11km). Note that the GPS-measured D+ for the 4K is 3,500m rather than exactly 4,000m — the '4K' name is a branding convention, not a precise measurement.
How the 4K Compares to the 8K — and to the Hardest Ultras in the Database▼
Is Trail Valle de Tena Ultra 4K sold out? No — unlike many comparable mountain ultras, the 4K has no sell-out history. Entry for 2026 is €80 (standard rate; early bird of €70 was valid until March 31, 2026). Registration is via Rock the Sport: rockthesport.com/es/evento/trail-valle-de-tena-2026.
Entry, Cost, and Getting to Panticosa: What You Need to Know▼
Where does Trail Valle de Tena Ultra 4K take place? The race is based in Panticosa, a mountain village in the Valle de Tena in the Aragonese Pyrenees, Spain. The nearest airports are Zaragoza (ZAZ) and Bilbao (BIO), both approximately 2–3 hours by car. Public transport to the start is not realistic — a car is strongly recommended.
Fichiers de course
Logistique
Aéroport le plus proche
Zaragoza (ZAZ) / Bilbao (BIO)
Notes
Start: 2–3h / Public transport: not realistic
