Passo San Boldo
SP635Borgo Valbelluna to Cison di Valmarino · Veneto
Distance7.0mi · 11.3 km
Drive time17 minon the road
DifficultyDemanding
MountainForest
A tiny pass of stacked hairpins built through the rock in 1918.
The SP635 over the Passo San Boldo north of Treviso climbs a wall of stacked switchbacks threaded through short tunnels cut into the cliff, a remarkable bit of road built in months during the First World War. Narrow and one-way-controlled in places; mind the single-lane tunnels, the tight hairpins, and oncoming traffic.
Where it runs
Borgo ValbellunaStart · Veneto
Cison di ValmarinoEnd · Italy
Character
Corners18bends
Tightness9of 10
Max gradient12%≈ 1-in-8
Hairpins15tight bends
Climb321 mtotal ascent
Summit730 mhighest point · 2395 ft
SpringSummerAutumn
Elevation
326 m rangeKnow before you go
- Single-lane tunnels with traffic control
- Very tight hairpins
- Oncoming traffic
Sources
In these collections
Nearby roads
The closest great drives to Passo San Boldo.
