EcoTrail Oslo - Trail 31 km - Elevation Profile, Aid Stations and Cutoffs
- Sørkedalen, Oslo, Norway
- 31.3 km
- 618 m D+
- 3 aid stations
Map, checkpoints and cutoffs Map · checkpoints · forecast opens May 20 Race-day forecast is live
Race-day conditions
Weather and daylight along the course and at all 5 checkpoints, set to the 11:00 start.
- Start
- 11:00
- Daylight at the start
- 04:11-22:17
- Aid stations
- 3
Course profile
Sørkedalen, Oslo, NorwayHuk, Bygdøy, Oslo, Norway· point-to-point
- Distance
- 31.3 kmFinishes 159 m lower than it starts
- Elevation
- +618 m-777 mAbout 20 m of climb per km
- Highest point
- 356 m
Next editionSat 29 May 2027 · 11:00
- Start
- Winner~1h581h58 after the start
- Median finisher2026 median3h33 after the start
- Cutoff9h after the start
EcoTrail Oslo - Trail 31 km is a 31.3 km ultra-trail with around 618 m of elevation gain, starting in Sørkedalen, Oslo, Norway. The overall cutoff is 9 hours. That is 20 m of climbing per kilometre. EcoTrail Oslo has 5 races, from 10 to 80.2 km; this one ranks 3 of 5 by distance and 3 of 5 by climbing per kilometre.
The biggest climb between checkpoints gains around 316 m from Start - Sørkedalen (km 0) to Fossum (km 10.3). The steepest sustained section on the elevation profile averages about 8% over roughly 2 km around km 1. Crew access is allowed at Fossum (10.3 km) and Thaugland (22.5 km).
Data is approximate and courses change between editions - always verify against the official race guide.
Other distances at EcoTrail Oslo
| Race | Distance | D+ | Cutoff | Next start |
|---|---|---|---|---|
| EcoTrail Oslo 80 | 80.2 km | 1,991 m | 13h30 | May 29, 2027 |
| EcoTrail Oslo 50 | 50.5 km | 1,026 m | 9h00 | May 29, 2027 |
| EcoTrail Oslo 31 (this page) | 31.3 km | 618 m | 9h00 | May 29, 2027 |
| EcoTrail Oslo 21 | 21 km | 234 m | 6h00 | May 29, 2027 |
| EcoTrail Oslo 10 | 10 km | 97 m | 9h00 | May 29, 2027 |
Plan against the cutoffs
Prepare every aid station against the official cutoffs, then unlock your full roadbook in the app.
Estimate your finish
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Course math
Four numbers worked out from this course's distance, elevation and checkpoints.
TrailMath effort-km
41 effort-km
Below 50 effort-km the model quotes no reference time.
Distance + gain ÷ 100 + loss ÷ 200, beside ITRA's gain-only km-effort. Model TM1.0.
How TrailMath works →UTMB Index category
20K
37 km-effort (distance + gain ÷ 100). Calculated from the course figures, not an official classification.
Estimate your UTMB Index → ITRA and UTMB indexes explainedBiggest climb section
+316 m
Sørkedalen → Fossum · km 0–10.3
The largest gain between two checkpoints, not one continuous climb.
Biggest descent section
−365 m
Fossum → Thaugland · km 10.3–22.5
The largest loss between two checkpoints. ITRA's km-effort ignores descent; TrailMath counts it: 41 km-effort.
Open in GPX Explorer →Share this race
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EcoTrail Oslo - Trail 31 km · 2026
Finish times, 2026 edition
803 runners started. 779 came back. Half of them took longer than 3:33:20.That left the median finisher 5:26:40 inside the 9h cutoff.
Median finish
3:33:20
Half of the 779 finishers were still out there at this point.
5:26:40in hand before the 9h cutoff
The start line
97.0%
779 of 803 starters made it; 24 did not.
still moving when a cutoff closed
stopped by choice or by the medics
Men and women
Two medians on the same scale. The bars run from the start to the cutoff, so the gap between them is the gap in time.
Men
3:21:15
median finish; average 3:25:12
398 finishers, 51% of the field
Women
3:45:21
median finish; average 3:47:31
379 finishers, 49% of the field
0:24:06 separates the two medians, across 398 men and 379 women.
Finish time by age group
Every track runs from the start to the 9h cutoff, so the empty part of a bar is the time that group's median finisher still had. Men and women are drawn on the same scale.
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| 18-19 | - | 2 - too few finishers to publish a time | |
| 20-22 | 3:01:32 | 9 - small sample, read with care | |
| 23-34 | 3:18:18 | 142 | |
| 35-39 | 3:21:31 | 86 | |
| 40-44 | 3:16:25 | 64 | |
| 45-49 | 3:20:34 | 27 | |
| 50-54 | 3:26:46 | 31 | |
| 55-59 | 3:33:58 | 19 - small sample, read with care | |
| 60-64 | 3:42:36 | 14 - small sample, read with care | |
| 65-69 | 3:56:26 | 4 - small sample, read with care |
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| 16-17 | - | 1 - too few finishers to publish a time | |
| 18-19 | - | 2 - too few finishers to publish a time | |
| 20-22 | 3:32:59 | 8 - small sample, read with care | |
| 23-34 | 3:37:25 | 155 | |
| 35-39 | 3:44:19 | 76 | |
| 40-44 | 3:46:20 | 55 | |
| 45-49 | 3:56:38 | 29 | |
| 50-54 | 3:52:13 | 32 | |
| 55-59 | 4:27:10 | 12 - small sample, read with care | |
| 60-64 | 4:27:10 | 7 - small sample, read with care | |
| 65-69 | - | 2 - too few finishers to publish a time |
Full bar: 20 finishers or more. Tick alone: fewer than 20, too few for a median to say much. The shaded row is the biggest group.
Where the finishers came from
91% of the finishers came from Norway alone.
| Nation | Finishers | Share |
|---|---|---|
| NorwayNO | 70790.8% | |
| United KingdomGB | 141.8% | |
| FranceFR | 111.4% | |
| GermanyDE | 91.2% | |
| SwedenSE | 50.6% | |
| United StatesUS | 50.6% | |
| IrelandIE | 30.4% | |
| LithuaniaLT | 30.4% | |
| BrazilBR | 20.3% | |
| DenmarkDK | 20.3% | |
| SpainES | 20.3% | |
| MexicoMX | 20.3% | |
| NetherlandsNL | 20.3% | |
| ArgentinaAR | 10.1% | |
| SwitzerlandCH | 10.1% | |
| FinlandFI | 10.1% | |
| ItalyIT | 10.1% | |
| South KoreaKR | 10.1% | |
| LuxembourgLU | 10.1% | |
| LatviaLV | 10.1% | |
| PolandPL | 10.1% | |
| Palestinian TerritoriesPS | 10.1% | |
| SlovakiaSK | 10.1% | |
| TürkiyeTR | 10.1% | |
| South AfricaZA | 10.1% | |
| 15 other nations5 other nations | 182.3%50.6% |
Showing 20 of 25 nations.Showing 25 of 25 nations.
Bar length is against the largest nation. The smallest counts are drawn at a minimum visible width, so their bars are not to scale.
How these numbers were computed
These are times for runners who finished. They exclude everyone who started and did not, so they describe how long finishing took, not how long the race takes. Bands with only a handful of finishers move a lot from one edition to the next.
We plot the median, not the average. A handful of very quick runners drags the average well below the time half the field actually beat, so the median is the honest number to plan against.
Nationality here shows who travels to this race, not who runs it best. That alone is why a host nation tops almost every list.
Computed from the full official results, verifiedNovember 2, 2026 - Official results
Ask the course
Ask EcoTrail Oslo 31 anything about climbs, pacing, crew or cutoffs.
Answers come from this course's data, your plan and your training.
Which climb should I respect most?
Sørkedalen to Fossum: +316 m over 10.3 km, straight from the gun. Hike the steep sections at an effort you could hold for hours - the race is decided after this climb, not on it.
Where can my crew meet me?
Fossum, km 10.3 - the first of 2 crew points. The next is Thaugland, km 22.5.
Is 3h a realistic finish for me?
3h would put you in the faster half of 2026 finishers - the median was 3:33:20. It means holding 5:45/km overall.
The assistant answers that once it can see your training.
Build your EcoTrail Oslo 31 plan and your question is the first thing waiting in the TrailMath Assistant.
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To answer this for you, the Course Assistant uses your training and your race plan.
Example answer
Your long runs peak at 10 km, so the plan builds to 4-hour long runs.
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Aid stations and checkpoints
| Checkpoint | Km | Cumulative gain (m) | Cumulative loss (m) | Cutoff |
|---|---|---|---|---|
| Start - Sørkedalen | 0 | 0 | 0 | - |
| FossumCrew | 10.3 | 316 | 313 | Sat 17:30 |
| ThauglandCrew | 22.5 | 517 | 678 | Sat 19:00 |
| Bygdøy | 26.3 | 565 | 708 | Sat 19:30 |
| Finish - Huk | 31.3 | 618 | 777 | - |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verifiedNovember 2, 2026 - Official race website
FAQ
How much elevation gain does EcoTrail Oslo - Trail 31 km have?
EcoTrail Oslo - Trail 31 km has around 618 m of cumulative elevation gain and 777 m of loss over 31.3 km.
What is the cutoff time for EcoTrail Oslo - Trail 31 km?
The overall EcoTrail Oslo - Trail 31 km cutoff is 9 hours, with intermediate time barriers at major checkpoints. Winning times are typically around 2 hours.
How long is EcoTrail Oslo - Trail 31 km?
EcoTrail Oslo - Trail 31 km covers approximately 31.3 km, starting in Sørkedalen, Oslo, Norway.
How many aid stations does EcoTrail Oslo - Trail 31 km have and which allow crew?
The checkpoint table lists 3 major aid points between the start and the finish. Crew access is allowed at Fossum (10.3 km) and Thaugland (22.5 km).
Training for this race?
TrailMath builds periodized trail training plans around your goal race.
One Strava connection reads your last 90 days and estimates your finish on this course. Free, no plan needed.