Italy · Alps
Passo del Mortirolo
Arguably the hardest climb in professional cycling. The Mortirolo's relentless double-digit gradients through dense forest have broken riders in the Giro d'Italia since 1990.
- Length
- 12.4 km
- Avg gradient
- 10.5%
- Max gradient
- 18%
- Elevation gain
- 1,300 m
- Summit
- 1,852 m
- Hairpins
- 15
Versants
- From Mazzo di Valtellina — 12.4 km at 10.5% (max 18%)
- From Monno — 9.5 km at 8.3% (max 14%)