Spain · Basque Country
Zegama-Aizkorri Mendi Maratoia
Distance
42 km
Date
May 17, 2026
Entry fee
75 EUR
€ / km
€1.79
Basque legend and Kilian´s backyard: steep, muddy, screaming crowds, and a mountain marathon that feels like a major.
Elevation and Terrain
Total Meters
2736m
D+/KM
65.14m/km
For context, the Tor des Géants 330 loop has 73 D+/km.
Avg Uphill Gradient
15.7%
Avg Downhill Gradient
-14.8%
Uphill gradient distribution
Route Profile
Analysed 2026-05-02Terrain breakdown
Terrain
Climbs
Top climbs
2.7 km · 559 m gain
starts km 20 · avg 20.5% · max 46.2%
4.5 km · 495 m gain
starts km 0 · avg 10.9% · max 30.5%
1.8 km · 315 m gain
starts km 15 · avg 17.5% · max 39.8%
Top descents
9.1 km · 726 m drop
starts km 33 · avg -8.0% · max -42.2%
3.1 km · 490 m drop
starts km 16 · avg -15.7% · max -90.2%
2.0 km · 399 m drop
starts km 30 · avg -20.0% · max -63.9%
Race files
Logistics
Nearest airport
Bilbao (BIO)
Notes
Start: ~1.5–2h by car / Public transport: difficult race morning
