San Boldo Pass

South side of the Passo San Boldo

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The Passo San Boldo (formerly Passo Sant'Ubaldo, also Umbaldopass ) is a small mountain pass in the Italian region Veneto between the towns Trichiana (329 m) and Tovena (272 m) over a distance of 17 km.

The pass lies on the southern edge of the Alps and connects the Val Belluna with the Val Mareno over a height of 706 m slm. The pass road is called SP 635 and is only one lane, the traffic is regulated by several traffic lights. There is a speed limit to 30 km / h and a height limit of 3.20 meters after repeatedly buses were stuck in the tunnel. Worth seeing is the unique bold route of the south ramp in a contract concluded by almost vertical cliffs Sacktal. Only five blasted into the rock close loop tunnels and six bridges can the pass be achieved.

History

Early as the late 19th century wanted to rebuild the steep road over the pass on a motorable road. But only in the First World War from February to June 1918, succeeded pioneers of the Austro- Hungarian Army to build this road to supply the Piave front in a record time of three months. Road the 100 days is called the building because of its short construction period. As workers also prisoners of war and the elderly, women and children of the local population were used. In the final phase of the construction of 1,400 workers worked in three shifts in the construction of this strategically important connection. Storing and transporting heavy artillery and supplies the slope could not be more than 12 % despite the extreme topographical conditions. The construction is still true today as technical performance.