Siaix tunnel – Col du Tra loop from Landry

Siaix tunnel – Col du Tra loop from Landry

Hard

4.2

(6)

264

riders

Siaix tunnel – Col du Tra loop from Landry

02:45

49.2km

1,070m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: August 25, 2026

Waypoints

Start point

Train Station

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4.57 km

Recreational lake

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A small swimming pond between the Isère and the cycle path. In addition to many outdoor and climbing opportunities (not just for children!), a welcome refreshment after the exertion of cycling (or hiking).

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7.06 km

Rafting & Relaxing Area

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17.7 km

Siaix tunnel

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Great tunnel that is strangely hardly used, even though it's one of the best bike paths I've ever ridden. Caution: To get to the eastern entrance you have to climb …

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21.6 km

View of the Chapelle Saint Jacques

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At the foot of the winding road to Notre Dame du Pré, stands this chapel built atop an isolated rock. Until 1600, the Château Saint Jacques occupied this ideal location, …

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30.9 km

Col du Tra

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The Col du Tra from Pomblière is 12km long with a total drop of 809m. The average gradient is 6.74% with maximum gradients of 8.6%.

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49.2 km

End point

Train Station

Way Types & Surfaces

Way Types

29.3 km

15.8 km

3.46 km

365 m

274 m

Surfaces

49.1 km

141 m

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (1,310 m)

Lowest point (540 m)

Weather

Today

Wednesday 14 October

18°C

7°C

0 %

Additional weather tips

Max wind speed: 5.0 km/h

to get more detailed weather forecasts along your route

Comments

May 12, 2022,late afternoon spin to wake me up

For the second ride in a row I forgot my phone so no pictures which is a shame as the village of notre dam du Pré is delightful and the descent is an absolute switchback fest with amazing views down the valley. Next time I promise there will be pictures 😉