Altigraph · Race profiles · 20 km de Vannes 2026
20 km de Vannes 2026: elevation profile, climbs and gradients
Road race in Vannes on 27 September 2026: 20 km with 109 m of climbing and 113 m of descent, according to the course published by the organiser. Here is where it climbs, how steep, and where the race is decided.
The profile
The three numbers to read first
- 5.4 metres climbed per km. Rolling course: a few real climbs, plan them.
- Where the climbing sits. No climb worth the name: the biggest one gains 11 m. Pacing is about the wind, the crowd and the water stations, not the hills.
- The steepest 100 m. The steepest 100 m are at km 0.7, at +5.5 %: nothing you cannot run.
Open this course in Altigraph. The interactive version: hover the profile, see the map coloured by gradient, download or share the image.
The sections that matter
Sections longer than 200 m at 2 % or more, or with at least 10 m of elevation change. Everything else is flat or false flat. Max = the steepest 100 m of the section.
| Where | What | Length | Altitude | Avg | Max |
|---|---|---|---|---|---|
| km 0.6 → 1.210 → 21 m | climb | 550 m | 10 → 21 m | +1.9 % | +5.5 % |
| km 1.4 → 2.121 → 6 m | descent | 720 m | 21 → 6 m | -2.1 % | -5.3 % |
| km 4.9 → 5.215 → 21 m | climb | 310 m | 15 → 21 m | +2.1 % | +3.2 % |
| km 5.3 → 5.721 → 3 m | descent | 470 m | 21 → 3 m | -3.7 % | -4.6 % |
| km 13.8 → 14.34 → 18 m | climb | 540 m | 4 → 18 m | +2.5 % | +3.5 % |
| km 14.8 → 15.320 → 9 m | descent | 520 m | 20 → 9 m | -2.0 % | -2.4 % |
| km 16.3 → 16.511 → 5 m | descent | 270 m | 11 → 5 m | -2.4 % | -2.9 % |
| km 17.6 → 17.94 → 12 m | climb | 350 m | 4 → 12 m | +2.2 % | +4.0 % |
| km 17.9 → 18.412 → -6 m | descent | 500 m | 12 → -6 m | -3.5 % | -5.6 % |
| km 18.5 → 18.7-6 → 3 m | climb | 220 m | -6 → 3 m | +4.1 % | +5.3 % |
The steepest stretches
-5.6 % · at km 18.2steepest descent over 100 m
-5.1 % · at km 18.1steepest descent over 250 m
-3.6 % · at km 17.9steepest descent over 500 m
-1.8 % · at km 1.1steepest descent over 1000 m
Where the numbers come from
The course is the public Strava route published by the organiser (« 20KM de Vannes »), read without an account through its public embed. Altigraph shows the computed profile and links to the original route; the track itself is not redistributed.
No official climbing figure was found on the organiser's website; the 109 m above are computed by Altigraph after smoothing the altitude over 50 m, which removes GPS jitter. Adding up every rise of the same track without any smoothing gives 132 m: that raw sum is usually the figure race brochures quote.
Method: the track is resampled every 10 m, altitude is smoothed over 50 m either side, the local gradient is measured over 100 m, then the course is cut into climbs (over 1.5 %), descents (under -1.5 %) and flat parts. The thresholds are the same as on the home page.
Open this course in Altigraph. The interactive version: hover the profile, see the map coloured by gradient, download or share the image.
Other race profiles
- Vannes 10 km Gwened Nocturne 26 September 2026 · Vannes · 10 km · +50 m
- Marathon de Vannes 27 September 2026 · Vannes · 42.195 km · +245 m
- Supertri Toulouse, Olympic run course 4 October 2026 · Toulouse · 10.2 km · +74 m
- Supertri Toulouse, Sprint run course 4 October 2026 · Toulouse · 5.05 km · +46 m
- All race profiles
Profile computed on 21 September 2026 from the organiser's course. A course can change until race day: the organiser's page is the reference.