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1 Puy-de-DômeAuvergne-Rhône-Alpes, France

Col des Fourches

North-western ascent from Saint-Dier-D'Auvergne — the hardest of the 2 ways up

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GPX

Length: 21.5 km
Height gain: 517 m
Average: 2.4%
Steepest km: 7.3%
Summit altitude: 975 m
Difficulty: 129

Puy-de-Dôme · 4th of the five hardest

2 ways up · this is the hardest Compare all 2

Le Garret 25.2 km, 2.3% average, 578 m height gain
Saint-Dier-D'Auvergne 21.5 km, 2.4% average, 517 m height gain

Elevation profile

458 m → 994 m Touch or hover to inspect

0–4% 4–6% 6–8% 8–10% 10–14% 14%+

Steepest km: km 13 at 7.3%

Climb analysis

Where the climbing is

0–4%: 10.8 km
4–6%: 3.0 km
6–8%: 7.8 km
8–10%: 0.0 km
10–14%: 0.0 km
14%+: 0.0 km

Hardest sustained

1 km · km 12.2–13.2: 7.4%
2 km · km 19.4–21.4: 6.7%
5 km · km 2.2–7.2: 5.5%

Time to the top

1h 05 at 3 W/kg · 70 kg rider + 8 kg bike, no wind

How this is calculated

Kilometre by kilometre

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Km	Altitude	Gain	Gradient	Max
1	527 m	+69 m	6.9%	7.8%
2	511 m	−16 m	−1.6%	5.0%
3	562 m	+51 m	5.1%	6.4%
4	625 m	+63 m	6.3%	7.0%
5	689 m	+64 m	6.4%	7.0%
6	739 m	+50 m	5.0%	7.4%
7	787 m	+48 m	4.8%	7.4%
8	798 m	+11 m	1.1%	3.0%
9	812 m	+14 m	1.4%	4.6%
10	844 m	+32 m	3.2%	5.2%
11	874 m	+30 m	3.0%	5.6%
12	864 m	−10 m	−1.0%	5.0%
13	937 m	+73 m	7.3%	7.6%
14	988 m	+50 m	5.0%	7.4%
15	973 m	−15 m	−1.5%	3.8%
16	933 m	−40 m	−4.0%	0.0%
17	871 m	−63 m	−6.3%	0.0%
18	816 m	−55 m	−5.5%	0.0%
19	814 m	−2 m	−0.2%	7.0%
20	882 m	+68 m	6.8%	7.0%
21	945 m	+63 m	6.3%	6.6%
22	975 m	+31 m	5.6%	7.6%

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About Col des Fourches

How long and how steep?: From Saint-Dier-D'Auvergne, Col des Fourches is 21.5 km long and climbs 517 m at an average of 2.4%, to a summit at 975 m. Its steepest kilometre, km 13, averages 7.3%.
How long does it take?: At 3 W/kg it takes about 1 h 05 min to reach the top, at 4 W/kg about 52 min (70 kg rider, 8 kg bike, no wind).
What category is it?: It's a category 1 climb, with a difficulty score of 129. It's the hardest of the 2 ways up to Col des Fourches.
Where is it?: It's in Puy-de-Dôme, Auvergne-Rhône-Alpes, France.

How hard is 129?

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

Urraki, Tolosa 129

Col du Béal, Job 129

Col des Fourches, Saint-Dier-D'Auvergne 129

Sestriere, Cesana Torinese 128

Col de La Perche, Thuès-Entre-Valls 128

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Added by Thutmose · 1 contributor

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