Altigraphs
2

Col du Grand Bois

North-western ascent from Saint-Ètienne — the hardest of the 3 ways up

Elevation profile

588 m → 1161 m
0–4% 4–6% 6–8% 8–10% 10–14% 14%+
Steepest kilometre: km 1 at 7.3% — peaks at 8%
Elevation inside a tunnel is unreliable — the survey reads the mountain above the road, not the road. Report a tunnel

Climb stats

573 m Ascent
12.89 km Length
4.44% Average
8% Maximum
1159 m Summit altitude
95 Difficulty

Kilometre by kilometre

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Km Altitude Gain Average Max Gradient
1 661 m +73 m 7.3% 8%
2 731 m +70 m 7% 8%
3 788 m +57 m 5.7% 7%
4 844 m +57 m 5.7% 6%
5 904 m +59 m 5.9% 7%
6 960 m +57 m 5.7% 6%
7 1009 m +48 m 4.8% 6%
8 1041 m +32 m 3.2% 5%
9 1055 m +14 m 1.4% 3%
10 1067 m +12 m 1.2% 2%

Route map

Paved Unpaved Cobblestone Unknown
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Photos

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Rider notes

What it is actually like, from people who have ridden it
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How hard is 95?

Difficulty score is length × gradient, weighted for the steepest kilometre.

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Conditions at the summit

13°
Partly cloudy · feels like 12°
Wind 4 km/h N
Updated 1 min ago
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