Circuito de senderismo de 91.76 km desde Amorebieta. El desnivel positivo es de 5635 m, con una altitud entre 68 m y 600 m. Duración estimada: 32 h 50 min. Municipio de salida: Amorebieta (Euskadi, Espagne).
Esta ruta incluye 11 subidas significativas. Con un desnivel acumulado de 2228 m a lo largo de 26.74 km, con una pendiente media del 8.3%.
- Climb 1 (at km 7.82 km): +325 m over 3.47 km, average slope 9.4%
- Climb 2 (at km 12.03 km): +96 m over 881 m, average slope 10.9%
- Climb 3 (at km 24.88 km): +161 m over 2.57 km, average slope 6.3%
- Climb 4 (at km 31.65 km): +414 m over 4.02 km, average slope 10.3%
- Climb 5 (at km 37.87 km): +126 m over 1.81 km, average slope 7.0%
- Climb 6 (at km 47.11 km): +165 m over 2.11 km, average slope 7.8%
- Climb 7 (at km 49.97 km): +53 m over 912 m, average slope 5.8%
- Climb 8 (at km 55.05 km): +106 m over 1.55 km, average slope 6.9%
- Climb 9 (at km 64.18 km): +372 m over 4.67 km, average slope 8.0%
- Climb 10 (at km 72.51 km): +228 m over 2.51 km, average slope 9.1%
- Climb 11 (at km 86.56 km): +182 m over 2.24 km, average slope 8.1%
