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
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Trichiana
Guides
Source: en.wikipedia.org, checked 2026-10-18