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1 Upper SavoyAuvergne-Rhône-Alpes, France

Col de Cou

Southern ascent from Saint-Jeoire — the hardest of the 2 ways up

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GPX

Length: 24.2 km
Height gain: 533 m
Average: 2.2%
Steepest km: 6.3%
Summit altitude: 1117 m
Difficulty: 101

Upper Savoy · 36 climbs

2 ways up · this is the hardest Compare all 2

Saint-Jeoire 24.2 km, 2.2% average, 533 m height gain
Boëge 11.3 km, 3.4% average, 381 m height gain

Elevation profile

584 m → 1117 m Touch or hover to inspect

0–4% 4–6% 6–8% 8–10% 10–14% 14%+

Steepest km: km 15 at 6.3%

Climb analysis

Where the climbing is

0–4%: 15.3 km
4–6%: 7.7 km
6–8%: 0.8 km
8–10%: 0.5 km
10–14%: 0.0 km
14%+: 0.0 km

Hardest sustained

1 km · km 14.2–15.2: 6.5%
2 km · km 1.8–3.8: 5.1%
5 km · km 10.1–15.1: 4.4%

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	634 m	+50 m	5.0%	10.2%
2	668 m	+34 m	3.4%	5.6%
3	719 m	+51 m	5.1%	6.4%
4	769 m	+50 m	5.0%	12.0%
5	795 m	+26 m	2.6%	5.6%
6	830 m	+35 m	3.5%	4.8%
7	856 m	+26 m	2.6%	5.0%
8	880 m	+24 m	2.4%	3.8%
9	885 m	+4 m	0.4%	2.2%
10	890 m	+5 m	0.5%	2.2%
11	918 m	+28 m	2.8%	3.8%
12	962 m	+44 m	4.4%	5.8%
13	1013 m	+52 m	5.1%	6.0%
14	1044 m	+30 m	3.0%	5.8%
15	1106 m	+63 m	6.3%	10.8%
16	1110 m	+4 m	0.4%	4.4%
17	1087 m	−23 m	−2.3%	4.2%
18	1085 m	−2 m	−0.2%	2.0%
19	1027 m	−58 m	−5.8%	0.0%
20	976 m	−51 m	−5.1%	0.0%
21	976 m	−1 m	−0.1%	5.0%
22	1013 m	+37 m	3.7%	5.2%
23	1059 m	+47 m	4.7%	5.0%
24	1107 m	+47 m	4.7%	5.0%
25	1117 m	+10 m	4.7%	10.0%

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About Col de Cou

How long and how steep?: From Saint-Jeoire, Col de Cou is 24.2 km long and climbs 533 m at an average of 2.2%, to a summit at 1,117 m. Its steepest kilometre, km 15, averages 6.3%.
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 53 min (70 kg rider, 8 kg bike, no wind).
What category is it?: It's a category 1 climb, with a difficulty score of 101. It's the hardest of the 2 ways up to Col de Cou.
Where is it?: It's in Upper Savoy, Auvergne-Rhône-Alpes, France.

How hard is 101?

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

Alto del Moro, Guadalupe 101

Puerto de Pedro Rúiz, Ubrique 101

Col de Cou, Saint-Jeoire 101

Alt St Cecilia, Monistrol de Montserrat 100

Coll de la Ibola, Tales 100

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Added by Thutmose · 1 contributor

Climbs nearby

1 1126 m 582 m

Col de Cou via Col de Terramont From Saint-Jeoire · starts here

24.5 km +544 m 2.2%

HC 1612 m 635 m

Col de la Ramaz From Mieussy · starts 5.4 km away

13.7 km +977 m 7.1%

HC 1503 m 463 m

Plateau de Solaison From Thuet · starts 8.4 km away

11.7 km +1040 m 8.9%

2 1116 m 735 m

Col de Cou From Boëge · starts 8.5 km away

11.3 km +381 m 3.4%