Passo del Mortirolo
SP81Mazzo di Valtellina to Monno · Lombardy
Distance10.1mi · 16 km
Drive time23 minon the road
DifficultyExpert
MountainForest
Cycling's most feared climb, brutally steep and narrow.
The Mortirolo Pass at 1,852 m between Mazzo di Valtellina and Monno is one of the most feared climbs in cycling, a narrow, relentlessly steep road through forest with ramps up to 18%. Demanding to drive too; mind the gradient, the cyclists, and the tight, blind bends.
Where it runs
Mazzo di ValtellinaStart · Lombardy
MonnoEnd · Italy
Character
Corners40bends
Tightness8of 10
Max gradient18%≈ 1-in-6
Climb1090 mtotal ascent
Summit1875 mhighest point · 6152 ft
Range1133 mtop to bottom
SummerAutumn
Elevation
1133 m rangeKnow before you go
- Extreme gradient and tight bends
- Cyclists in numbers
- Narrow, blind corners
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