Altigraph · Race profiles · Salomon EcoTrail Paris, 45 km trail 2027
Salomon EcoTrail Paris, 45 km trail 2027: elevation profile, climbs and gradients
Trail from Versailles to Paris on 20 March 2027: 47.1 km with 725 m of climbing and 801 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
- 15.2 metres climbed per km. Hilly course: the climbs decide the race, hold an even effort.
- Where the climbing sits. 9 climbs in all. The biggest runs from km 27.3 to km 28.8: 1.53 km at +5.6 % on average (+86 m, peak +17.3 %). The last real climb tops out at km 36.8, 10.84 km from the finish: that is where you can finally commit. The climbing is spread along the course: a steady effort from start to finish is the plan.
- The steepest 100 m. The steepest 100 m are at km 26.0, at +17.8 %: 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 4.6 → 4.8112 → 120 m | climb | 240 m | 112 → 120 m | +3.5 % | +5.1 % |
| km 4.8 → 5.1120 → 113 m | descent | 250 m | 120 → 113 m | -3.0 % | -3.8 % |
| km 5.7 → 6.1112 → 121 m | climb | 340 m | 112 → 121 m | +2.7 % | +3.3 % |
| km 7.0 → 7.3123 → 128 m | climb | 240 m | 123 → 128 m | +2.2 % | +3.3 % |
| km 7.6 → 9.3123 → 179 m | climb | 1,780 m | 123 → 179 m | +3.1 % | +11.2 % |
| km 10.5 → 11.2173 → 148 m | descent | 660 m | 173 → 148 m | -3.7 % | -15.4 % |
| km 11.4 → 11.7147 → 172 m | climb | 290 m | 147 → 172 m | +8.3 % | +15.7 % |
| km 11.7 → 13.0171 → 107 m | descent | 1,260 m | 171 → 107 m | -5.1 % | -17.6 % |
| km 13.7 → 14.8104 → 173 m | climb | 1,090 m | 104 → 173 m | +6.3 % | +13.1 % |
| km 16.9 → 17.5174 → 129 m | descent | 610 m | 174 → 129 m | -7.5 % | -17.1 % |
| km 17.5 → 18.1129 → 172 m | climb | 610 m | 129 → 172 m | +7.0 % | +15.4 % |
| km 18.8 → 19.4166 → 176 m | climb | 610 m | 166 → 176 m | +1.6 % | +4.5 % |
| km 19.7 → 20.6176 → 105 m | descent | 920 m | 176 → 105 m | -7.8 % | -19.8 % |
| km 20.9 → 21.8104 → 137 m | climb | 900 m | 104 → 137 m | +3.6 % | +5.8 % |
| km 21.8 → 22.0136 → 127 m | descent | 220 m | 136 → 127 m | -4.2 % | -6.7 % |
| km 22.0 → 22.8127 → 141 m | climb | 790 m | 127 → 141 m | +1.7 % | +8.3 % |
| km 22.9 → 23.2141 → 135 m | descent | 280 m | 141 → 135 m | -2.2 % | -3.0 % |
| km 23.7 → 24.0132 → 120 m | descent | 290 m | 132 → 120 m | -4.3 % | -6.7 % |
| km 24.6 → 25.3116 → 138 m | climb | 760 m | 116 → 138 m | +2.8 % | +8.0 % |
| km 25.4 → 25.7137 → 110 m | descent | 330 m | 137 → 110 m | -8.3 % | -12.1 % |
| km 25.7 → 26.2110 → 168 m | climb | 500 m | 110 → 168 m | +11.5 % | +17.8 % |
| km 26.2 → 27.3168 → 76 m | descent | 1,050 m | 168 → 76 m | -8.7 % | -16.0 % |
| km 27.3 → 28.876 → 162 m | climb | 1,530 m | 76 → 162 m | +5.6 % | +17.3 % |
| km 28.8 → 29.0162 → 153 m | descent | 230 m | 162 → 153 m | -4.0 % | -6.0 % |
| km 29.0 → 29.3153 → 167 m | climb | 270 m | 153 → 167 m | +5.4 % | +9.4 % |
| km 29.3 → 29.9167 → 124 m | descent | 600 m | 167 → 124 m | -7.2 % | -17.7 % |
| km 30.3 → 31.1122 → 165 m | climb | 770 m | 122 → 165 m | +5.6 % | +16.5 % |
| km 31.1 → 32.0165 → 140 m | descent | 900 m | 165 → 140 m | -2.8 % | -10.2 % |
| km 32.8 → 33.7144 → 124 m | descent | 900 m | 144 → 124 m | -2.2 % | -7.2 % |
| km 33.9 → 35.1131 → 98 m | descent | 1,190 m | 131 → 98 m | -2.7 % | -5.4 % |
| km 35.4 → 36.3104 → 61 m | descent | 890 m | 104 → 61 m | -4.8 % | -11.2 % |
| km 36.3 → 36.861 → 100 m | climb | 500 m | 61 → 100 m | +7.8 % | +15.0 % |
| km 36.8 → 38.1100 → 30 m | descent | 1,290 m | 100 → 30 m | -5.4 % | -8.1 % |
| km 38.8 → 39.037 → 26 m | descent | 230 m | 37 → 26 m | -4.8 % | -8.6 % |
The steepest stretches
-19.8 % · at km 19.8steepest descent over 100 m
-15.4 % · at km 19.8steepest descent over 250 m
-11.3 % · at km 19.7steepest descent over 500 m
-9.1 % · at km 26.2steepest 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 45km... »), 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 800 m of climbing; Altigraph computes 725 m after smoothing the altitude over 50 m, which removes GPS jitter (9 % less here). Adding up every rise of the same track without any smoothing gives 844 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.