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

Col de Dyane

Western ascent from La Bourboule — the hardest of the 2 ways up

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GPX

Length: 18.1 km
Height gain: 598 m
Average: 3.3%
Steepest km: 7.9%
Summit altitude: 1450 m
Difficulty: 146

Puy-de-Dôme · 3rd of the five hardest

2 ways up · this is the hardest Compare all 2

La Bourboule 18.1 km, 3.3% average, 598 m height gain
Monneaux 5.5 km, 6.2% average, 339 m height gain

Elevation profile

853 m → 1450 m Touch or hover to inspect

0–4% 4–6% 6–8% 8–10% 10–14% 14%+

Steepest km: km 13 at 7.9%

Climb analysis

Where the climbing is

0–4%: 7.4 km
4–6%: 3.5 km
6–8%: 5.5 km
8–10%: 1.3 km
10–14%: 0.5 km
14%+: 0.0 km

Hardest sustained

1 km · km 12.6–13.6: 8.8%
2 km · km 12.6–14.6: 7.6%
5 km · km 12.6–17.6: 6.6%

Time to the top

1h 01 at 3 W/kg · 70 kg rider + 8 kg bike, no wind

How this is calculated

Kilometre by kilometre

Export CSV

Km	Altitude	Gain	Gradient	Max
1	927 m	+75 m	7.5%	8.8%
2	1003 m	+76 m	7.6%	12.8%
3	1057 m	+54 m	5.4%	8.4%
4	1126 m	+69 m	6.9%	10.6%
5	1174 m	+48 m	4.8%	9.6%
6	1177 m	+3 m	0.3%	2.2%
7	1156 m	−21 m	−2.1%	0.0%
8	1106 m	−50 m	−5.0%	0.0%
9	1140 m	+34 m	3.4%	7.4%
10	1135 m	−5 m	−0.5%	5.2%
11	1065 m	−70 m	−7.0%	0.0%
12	1062 m	−4 m	−0.4%	5.5%
13	1140 m	+79 m	7.9%	10.6%
14	1213 m	+72 m	7.2%	10.0%
15	1272 m	+59 m	5.9%	7.2%
16	1328 m	+56 m	5.6%	13.0%
17	1393 m	+65 m	6.5%	7.0%
18	1449 m	+56 m	5.6%	7.2%
19	1450 m	+2 m	1.1%	1.2%

Route map

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Directions

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About Col de Dyane

How long and how steep?: From La Bourboule, Col de Dyane is 18.1 km long and climbs 598 m at an average of 3.3%, to a summit at 1,450 m. Its steepest kilometre, km 13, averages 7.9%.
How long does it take?: At 3 W/kg it takes about 1 h 01 min to reach the top, at 4 W/kg about 49 min (70 kg rider, 8 kg bike, no wind).
What category is it?: It's a category 1 climb, with a difficulty score of 146. It's the hardest of the 2 ways up to Col de la Croix-Saint-Robert.
Where is it?: It's in Puy-de-Dôme, Auvergne-Rhône-Alpes, France.

How hard is 146?

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

Puerto de La Ragua, La Calahorra 146

Alto de los Castillejos 146

Col de Dyane, La Bourboule 146

Alto de Seragude, O Amorín 146

Germil, Entre Ambos-os-Rios 146

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Added by Thutmose · 1 contributor

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