Which race ranks first — and why is it Soča Outdoor Festival?

Soča Outdoor Festival leads this ranking on flat grade share (34.2%).

Compare Soča Outdoor Festival vs The Arctic Triple // Lofoten Ultra-Trail

Ranked comparison table
#RaceFlat grade shareAscentClimb densityDescentNet elevationMax absolute gradeAs of
1Soča Outdoor Festival 12K - slovenia34.2%310 m26.5 m/km318 m-9 m38.0%
2The Arctic Triple // Lofoten Ultra-Trail 12K - norway31.3%464 m38.7 m/km465 m-0 m91.3%
3Kia Fjällmaraton (Fjällmaratonveckan), Årefjällen 12K - sweden29.8%288 m24.0 m/km295 m-6 m18.9%
4Endurancelife Pembrokeshire 12K - wales22.6%353 m29.2 m/km343 m10 m28.9%
5Dolomiti Extreme Trail 12K - italy15.1%571 m47.6 m/km573 m-2 m48.6%
6Carson Canyons Super-K Trail Runs 12K - nevada8.9%473 m39.4 m/km464 m9 m26.6%
7Garda Trentino Trail 12K - italy8.6%806 m67.2 m/km806 m-0 m72.7%
1
Flat grade share
34.2%
Ascent
310 m
Climb density
26.5 m/km
Descent
318 m
Net elevation
-9 m
Max absolute grade
38.0%

As of

4
Flat grade share
22.6%
Ascent
353 m
Climb density
29.2 m/km
Descent
343 m
Net elevation
10 m
Max absolute grade
28.9%

As of

5
Flat grade share
15.1%
Ascent
571 m
Climb density
47.6 m/km
Descent
573 m
Net elevation
-2 m
Max absolute grade
48.6%

As of

7
Flat grade share
8.6%
Ascent
806 m
Climb density
67.2 m/km
Descent
806 m
Net elevation
-0 m
Max absolute grade
72.7%

As of

7 qualifying races in this ranking; use the distance catalogue to search the full distance list. Scores are out of 100 when present; route, elevation and cost figures are shown in their natural units.

How we ranked these

Races are ranked by Flat grade share. Score metrics use methodology scoring-methodology-v1.0. Elevation rankings use only trusted raw-elevation course profiles. A ranking is only published when at least five races qualify, so the table is never padded with thin data.

See exactly how each figure is calculated →

Route maps for this ranking

Common questions

What is the flattest 12ks?

Soča Outdoor Festival 12K ranks first by flat grade share, from 7 qualifying races compared under our published methodology.