Monte and Forte Jafferau (2805 metres) via Col Basset


The Alpine borders between Italy and France are lined with forts and high altitude military roads – most dating from the end of the 19th century or World War 1. Forte Jafferau (2805 metres) is the highest Fort in Italy and the second highest in Europe. It was built between 1896 and 1898. It was bombarded and largely destroyed as part of the peace treaty ending World War 2.

The higest Fort in the Alps is atop Mont Chaberton (3131 metres) – cycling details here.

I started in Bardonecchia, climbing a paved road to the little ski station of Jafferau – it appeared in the 2013 Giro d’Italia. At roughly 1900 metres, just before the end of the paved road, I turned onto the unpaved military road: Strada militare Fenil-Pramand-Föens-Jafferau, built in 1886.

It can be slightly confusing to find the start of this ride from the centre of Bardonecchia. See map below and/or look for the road that goes under the highway signed to Gleise.

The military strada is a good quality, single lane, gravel road. Initially, it hairpins up through a light forest:

heading higher

It becomes less steep above 2100 metres straightening out along a ridge, passing Forte Foëns.

Great old military road
Nice views

Before the road turn into the mountains, towards Col Basset, it intersects with another branch of the military road that climbs from Salbertrand. This is closed, or at least not passable, due to the collapse of the Galleria (tunnel) Seguret. I’ve marked it on the map. I could see the road below and the entrance to the old tunnel. Apparently there was a way to hike over/around the 876 metre tunnel, but I’ve been told that it is very dangerous, and has avalanche debris. Avoid!

Entrance to collapsed tunnel

The road up to Col Basset (2596 metres) has some great hairpins.

Approaching Col Basset
Nearing Col Basset

At Col Basset, the road turns left along the ridge. According to this is the 18th highest road (paved or unpaved) in Europe.

It’s a little vertiginous:

Battling Vertigo
Col Basset

It’s a really fun road, snaking past Colle Jafferau and then heading up to the Fort at the summit of Monte Jafferau (2805 metres).

Here is an alternate, also great route up to Jafferau.

View from Forte Jafferau
Above 2800 metres.
Looking back towards Col Basset

From Monte Jafferau, I decided to descend the ski slopes back to Jafferau. It’s a very steep, rocky road for a good 5 kms. I don’t think even the strongest cyclsist could cycle up much of this. I had the wrong bike – no front suspension – so descended gingerly and even walked a few stretches. But no big deal.

This is a dream loop. So quiet, scenic …. and high. But bring a mountain bike.

An ever higher climb, Colle del Sommeiller, also starts from Bardonecchia – reaching 3000 metres. See here.

9.6 Awesome
  • Difficulty 9.5
  • Quiet / No Traffic 9.5
  • Views 9.5
  • Fun Factor 10
  • User Ratings (7 Votes) 6.8

Happiest while cycling uphill.


  1. Hi Will
    Do you know if there is a chance that the tunnel be reopened in the future? I planned to climb from Salbertrand….what about the slope above Bardonecchia ? more than 10%?
    thanks for the great views
    See you!

    • Salut Serge,

      As I understand it, the tunnel is seriously compromised and may never be repaired. The local government has undertaken to keep the road I climbed in good repair as compensation and as a way to keep the road to Col Basset / Fort Jafferau open.

      If you look at the map, there seems to be another way up from Savoulx. As the map shows, I descended it briefly to have a look … very steep.

      The route I climbed is rarely above 10%. The early hairpins (the “heading higher” photo) of the unpaved stretch were the steepest. But it is all very ride-able. The paved road to Jafferau is quite steep, but I don’t think over 10% often. I haven’t seen a profile but a lot of 8% – 10% I’d guess.

      Only my descent from Fort Jafferau is not very ride-able.

      Hope that helps,



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  5. Hello Will,
    salut Serge,

    In September 2018 they were repairing the tunnel.
    We managed to ride through, although there were 2 machines blocking the inside of the tunnel.
    Two people were working, to get the debris out of the tunnel.
    The wall in the tunnel had already been reinforced.

    En Septembre 2018 il y avait 2 ouvriers qui réparaient le tunnel.
    On a su passer, malgré qu’il y avait un petit camion et une excavatrice qui bloquaient tout le passage.
    Les murs du tunnel avaient également été renforcés par des fers de béton.

    Bonne continuation,

  6. Thank you Will for introducing us to the Forte Jafferau, what a wonderful ride. Just back from doing your ‘blue route’ (in fact, a ‘there and back’ variant, since we didn’t have the bottle to descend via the ski slopes. It was a completely enjoyable experience, which four of us did riding either mountain or gravel bikes. Although doable on gravel bike, it would definitely be more comfortable with front suspension, particularly up and down those corrugated pitches up to the summit. Am extremely tempted to try the tunnel next time – it looks awesome!


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