Hertzian Tower – Crête de Brie loop from Jarrie-Vizille
Hertzian Tower – Crête de Brie loop from Jarrie-Vizille
4.2
(17)
115
riders
Hertzian Tower – Crête de Brie loop from Jarrie-Vizille
06:01
54.3km
1,830m
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: June 19, 2026
Tips
Includes segments that may be dangerous
Parts of this route comprise highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.
After 17.7 km for 18 m
After 17.8 km for 18 m
After 40.3 km for 47 m
Waypoints
Start point
Train Station
Get Directions
6.35 km
Hertzian Tower
Highlight • Monument
12.5 km
Viewpoint
Viewpoint
15.1 km
Le Verderet
Lake
17.7 km
Bois de Jaillot
Forest
22.7 km
Ruins
Ruins
26.5 km
Chemin du Bois du Fournet
Highlight • Other
Translated by Google •
Tip by
35.7 km
This mountain is Chamechaude
Highlight • Other
Translated by Google •
Tip by
37.7 km
Crête de Brie
Highlight (Segment) • Trail
Translated by Google •
Tip by
44.5 km
Bois de Lauzet
Forest
45.9 km
Bellevue
Highlight • Viewpoint
50.0 km
Nice view of Montchaboud from the heights
Highlight • Viewpoint
Translated by Google •
Tip by
53.5 km
Ascent to Château de Bon Repos
Highlight • Climb
A little technical at the Saut du Moine with a big rocky step that you can go around on the right or cross by portage.
Translated by Google •
Tip by
54.3 km
End point
Train Station
Way Types & Surfaces
Way Types
30.0 km
11.5 km
6.97 km
4.21 km
1.36 km
219 m
Surfaces
25.0 km
12.8 km
7.40 km
6.16 km
1.59 km
1.37 km
< 100 m
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Elevation
Highest point (880 m)
Lowest point (240 m)
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Weather
Powered by Foreca
Saturday 4 July
33°C
13°C
0 %
Additional weather tips
Max wind speed: 15.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Comments
a lot of tarmac on the first part with some elevation gain. I'd do it again, but I'd retrace the route. Overall, a pleasant and relaxing outing.
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And it was not bad!
Starting on the black route (50km), I cut the last loop by following the end of the red to respect the time limit of the Sunday family meal! This is part of the interest of …
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