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Cison Di Valmarino

San Boldo Pass Tunnels

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San Boldo Pass Tunnels

Road cycling

4.9

(81)

Cycling

5.0

(3)

Mountain biking

5.0

(1)

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  • Location: Cison Di Valmarino, Treviso, Veneto, Italy

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    Tips

    April 9, 2026

    Road cycling

    The San Boldo Pass, which connects Valbelluna to Valmareno between the municipalities of Cison di Valmarino and Borgo Valbelluna, is one of the most spectacular passes in the Venetian Prealps. Known as the "Road of 100 Days", it was built in record time in 1918 by Austro-Hungarian military engineers for logistical purposes during the Great War.
    Its architectural uniqueness lies in the five hairpin bends carved entirely into the rock and regulated by traffic lights, which overcome a very steep difference in altitude in a small space.
    Showing Translation

    November 11, 2022

    Road cycling

    Road that can be pedaled both uphill and downhill. There are two traffic lights to alternate traffic. Apart from some initial sections with a steep slope, the rest of the climb is quiet especially in the area of the tunnels. Arrived at the pass you can go back down towards Tovena (from where you climbed) or continue towards the Belluno side towards the town of Trichiana.
    Translated by

    March 22, 2023

    Road cycling

    San Boldo is not that a difficult pass, but in my opininion one of the most beautiful :)
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    Nearby routes

    Best routes near San Boldo Pass Tunnels

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    4.3

    (6)

    268

    riders

    #1.

    Passo San Boldo and Piave River - ring tour from Valmareno

    83.3km

    04:01

    1,180m

    1,180m

    Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.

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    Hard
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    4.5

    (2)

    55

    riders

    20.1km

    01:15

    560m

    560m

    Cycle the moderate 12.5-mile Passo San Boldo route from Valmareno, featuring historic tunnels, hairpin bends, and panoramic views.

    Moderate
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    Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

    Hard

    Details

    Informations

    Elevation 690 m

    Weather

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    Tuesday 19 May

    22°C

    9°C

    55 %

    Additional weather tips

    Max wind speed: 7.0 km/h

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    Location: Cison Di Valmarino, Treviso, Veneto, Italy

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