Confident drivers only
Passo San Boldo
Belluno (Veneto) · 706 m · San Boldo, Strada dei 100 giorni, Tovena
Difficulty
WidthSingle lane
Beauty
SeasonOpen all year
A road built into the cliff in 100 days in 1918, with hairpin tunnels stacked on top of each other. Single lane through the tunnels, regulated by traffic lights, 30 km/h.
Not for: nervous or new drivers, large vehicles, trailers.
Planning aid only, not live data. Road signs and official traffic information always come first. Disclaimer
Campers and trailers: Legal limits apply
Height limit 3.2 m. Long motorhomes and caravans are not advised in the tunnel hairpins.
Easier alternatives
Via the A27 motorway and the Fadalto pass
Calmer alternatives, camper limits and the full route planner are part of Pro.
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Guides
Source: en.wikipedia.org, checked 2026-10-18