Altigraphs
2

Col de Porte

North-eastern ascent from Saint-Pierre-de-Chartreuse
3 ways up
From Grenoble 14.8 km · 7.4% From Saint-Pierre-de-Chartreuse 8.2 km · 6.4% From La Diat 8.0 km · 6.6%
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Elevation profile

794 m → 1323 m
0–4% 4–6% 6–8% 8–10% 10–14% 14%+
Steepest kilometre: km 6 at 8.6% — peaks at 11.9%
Elevation inside a tunnel is unreliable — the survey reads the mountain above the road, not the road. Report a tunnel

Climb stats

529 m Ascent
8.25 km Length
6.41% Average
13% Maximum
1323 m Summit altitude
106 Difficulty

Kilometre by kilometre

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Km Altitude Gain Average Max Gradient
1 830 m +37 m 3.7% 6%
2 893 m +62 m 6.2% 9%
3 943 m +51 m 5.1% 8%
4 1013 m +69 m 6.9% 11%
5 1084 m +72 m 7.2% 11%
6 1171 m +86 m 8.6% 12%
7 1248 m +78 m 7.8% 13%
8 1314 m +66 m 6.6% 9%
9 1323 m +9 m 3.7% 5%

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 106?

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

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Conditions at the summit

12°
Clear · feels like 11°
Wind 1 km/h E
Updated 1 min ago
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