Altigraphs
1

Col de la Sié

South-western ascent from the Col from Brassac — the hardest of the 2 ways up
2 ways up
From the Col from Brassac 25.4 km · 2.6% From the Col from Brassac 25.4 km · 2.6%
Compare all 2

Elevation profile

507 m → 998 m
0–4% 4–6% 6–8% 8–10% 10–14% 14%+
Steepest kilometre: km 4 at 6.5% — peaks at 13.3%
Elevation inside a tunnel is unreliable — the survey reads the mountain above the road, not the road. Report a tunnel

Climb stats

650 m Ascent
25.37 km Length
2.56% Average
18% Maximum
998 m Summit altitude
99 Difficulty

Kilometre by kilometre

Export CSV
Km Altitude Gain Average Max Gradient
1 518 m +11 m 1.1% 3%
2 565 m +47 m 4.7% 8%
3 604 m +41 m 4.1% 8%
4 670 m +65 m 6.5% 9%
5 725 m +56 m 5.6% 8%
6 771 m +46 m 4.6% 7%
7 797 m +27 m 2.7% 5%
8 800 m +4 m 0.4% 3%
9 820 m +20 m 2% 4%
10 835 m +37 m 3.7% 18%

Route map

Paved Unpaved Cobblestone Unknown
Report a road type

Photos

No photos yet — be the first to add one.
Add a photo

Rider notes

What it is actually like, from people who have ridden it
Write a note
No rider notes yet — be the first to share what it's really like.

How hard is 99?

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

Improve this page

Every number here was measured by a rider. If you know this road, correct the data, add a photo, or leave a note for the next person.

Report a tunnel Report a road type
1 contributors History

Conditions at the summit

16°
Partly cloudy · feels like 15°
Wind 9 km/h NW
Updated Just now
Best months to ride
Nobody has voted yet Ridden this one? Tap the months you'd recommend to help other riders time it right.
Tap a month you'd recommend

Climbs nearby