Manival Forest Refuge – Large Rock loop from Saint-Ismier

Mountain biking trails

Manival Forest Refuge – Large Rock loop from Saint-Ismier

Hard

4.2

(5)

riders

Manival Forest Refuge – Large Rock loop from Saint-Ismier

03:15

22.3km

1,220m

Mountain biking

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is accessible with public transport.

Last updated: October 1, 2026

Tips

Includes a segment that is highly dangerous

A part of this route comprises highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.

After 14.0 km for 27 m

Waypoints

Start point

Bus stop

Get Directions

3.04 km

Short mountain bike descent

Highlight • Trail

Ideal for first "technical" descents by managing its trajectory and its speed (fall of 3m possible on the left)

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4.53 km

Plage de dépôt amont du Manival

Lake

6.49 km

Belle descente

Highlight • Trail

Nice first section, before the sequence of the next three

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7.47 km

Third Technical Descent Section (Parc naturel régional de Chartreuse)

Highlight (Segment) • Trail

3rd and last section before joining the multitude of singles which descend 610m at the various departures. In the sequence of the first two, it completes this nice alternative to …

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9.55 km

Nice single above Bernin

Highlight • Trail

Nice little single

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9.73 km

Pierre Champs Bertin Climbing Site

Highlight • Climb

Imposing rock that offers numerous routes to climbers of all levels

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13.8 km

Manival Forest Refuge

Highlight • Mountain Hut

Climbing the Manival to this hut is not easy 🤪

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19.5 km

Tour d'Arces and View of the Grésivaudan Valley

Highlight • Castle

The tower of Arces was once the keep of a fortified castle. Built between the 12th and 13th centuries, this castle made it possible to monitor the Grésivaudan valley.

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20.4 km

Large Rock

Highlight • Natural Monument

It is, as its name suggests, a big stone! This rather huge rock is quite curious. It is worth the detour!

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22.3 km

End point

Bus stop

Way Types & Surfaces

Way Types

17.1 km

2.31 km

1.22 km

1.09 km

547 m

< 100 m

Surfaces

7.80 km

6.72 km

3.31 km

1.89 km

1.86 km

717 m

< 100 m

Elevation

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

Highest point (870 m)

Lowest point (320 m)

Weather

Thursday 8 October

8°C

5°C

0 %

Additional weather tips

Max wind speed: 6.0 km/h

to get more detailed weather forecasts along your route

Comments

March 11, 2023,De part et d'autre du Corbonne et du Manival

Got a little lost above St Nazaire les Eymes, but it was a discovery...

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December 2, 2023,Quand on part tard... on finit de nuit !

First in the snow for this winter.
It's not the best to leave at past 3:30 p.m. for "a little tour" without light... It's a nice descent without visibility, with some nice slips or falls when stones appear unexpectedly under the snow! 🤪

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December 5, 2021,Partie de plaisir dans la neige, jusqu'à la nuit bien tombée...

After a very sporty afternoon watching biathlon in front of the TV, a little outing before nightfall to unwind a little, make nice slides in the snow and finish at night with the descent of the Manival to the national road. .
You have to have a little fun!

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