Altigraph · Race profiles · Salomon EcoTrail Paris, 10 km trail 2027
Salomon EcoTrail Paris, 10 km trail 2027: elevation profile, climbs and gradients
Trail in Saint-Cloud on 21 March 2027: 10.2 km with 169 m of climbing and 168 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
- 16.3 metres climbed per km. Hilly course: the climbs decide the race, hold an even effort.
- Where the climbing sits. 3 climbs in all. The biggest runs from km 0.8 to km 2.1: 1.35 km at +5.4 % on average (+72 m, peak +12.2 %). The last real climb tops out at km 5.3, 5.12 km from the finish: that is where you can finally commit. Most of the climbing sits in the first third of the course: hold back, the flat comes after.
- The steepest 100 m. The steepest 100 m are at km 1.0, at +12.2 %: steep enough that a brisk walk may be as fast as a run there.
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 0.8 → 2.131 → 104 m | climb | 1,350 m | 31 → 104 m | +5.4 % | +12.2 % |
| km 2.5 → 3.5101 → 131 m | climb | 1,000 m | 101 → 131 m | +3.0 % | +5.5 % |
| km 3.5 → 3.8131 → 124 m | descent | 200 m | 131 → 124 m | -3.5 % | -4.7 % |
| km 3.8 → 5.3124 → 161 m | climb | 1,490 m | 124 → 161 m | +2.5 % | +7.4 % |
| km 5.5 → 6.2159 → 129 m | descent | 760 m | 159 → 129 m | -3.9 % | -11.0 % |
| km 6.6 → 7.7134 → 110 m | descent | 1,020 m | 134 → 110 m | -2.3 % | -5.4 % |
| km 8.1 → 9.4110 → 31 m | descent | 1,370 m | 110 → 31 m | -5.8 % | -14.7 % |
The steepest stretches
-14.7 % · at km 8.7steepest descent over 100 m
-11.5 % · at km 8.6steepest descent over 250 m
-9.4 % · at km 8.7steepest descent over 500 m
-7.0 % · at km 8.4steepest descent over 1000 m
Where the numbers come from
The course is the public Strava route published by the organiser (« Salomon EcoTrail Paris Printemps 2027 - Trail 10km... »), 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.
The organiser quotes 170 m of climbing; Altigraph computes 169 m after smoothing the altitude over 50 m, which removes GPS jitter (1 % less here). Adding up every rise of the same track without any smoothing gives 189 m: that raw sum is usually the figure race brochures quote. Both figures describe the same course: the smoothed one is the better estimate of what your legs will feel, the raw one counts every bump. The organiser's figure.
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.
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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.