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Routes
Road cycling routes
France
Auvergne Rhône Alpes
Grenoble
Saint-Étienne-De-Saint-Geoirs

The Fortress – Col de Châtain (684 m) loop from Saint-Étienne-de-Saint-Geoirs

Routes
Road cycling routes
France
Auvergne Rhône Alpes
Grenoble
Saint-Étienne-De-Saint-Geoirs

The Fortress – Col de Châtain (684 m) loop from Saint-Étienne-de-Saint-Geoirs

Moderate

12

riders

The Fortress – Col de Châtain (684 m) loop from Saint-Étienne-de-Saint-Geoirs

01:43

32.4km

500m

Road cycling

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

Last updated: May 15, 2026

Waypoints

A

Start point

Bus stop

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1

4.82 km

Château de Sillans

Highlight • Other

Traces of this castle can be found in the archives dating back to 1315, when it was under the jurisdiction of the lord of Saint Geoirs. A remarkably well-preserved tower still remains.

Translated by Google •

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2

4.96 km

Beautiful typical farm of Dauphiné Isérois

Translated by Google •

Tip by

3

14.9 km

The Fortress

Highlight • Other

4

14.9 km

A pass not to be underestimated, very pretty Alpe d'Huez-typed bends!

Translated by Google •

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5

18.1 km

Col de Châtain (684 m)

Highlight • Mountain Pass

The Col de Chatain from Tullins is 7.23 km long with a total drop of 469 m. The average gradient is 6.49% with maximum gradients of 12%.

Translated by Google •

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B

32.4 km

End point

Bus stop

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Way Types & Surfaces

Way Types

30.3 km

1.66 km

329 m

121 m

Surfaces

29.7 km

2.27 km

467 m

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Elevation

Elevation

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

Highest point (690 m)

Lowest point (380 m)

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Weather

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Monday 25 May

31°C

15°C

12 %

Additional weather tips

Max wind speed: 2.0 km/h

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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