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About RaceIndexOur methodologyData coverageCyclingTriathlon

Flattest others

The flattest others, ranked from trusted raw-elevation route profiles across 60 qualifying races.

Ranking current as of

Which race ranks first — and why is it Martian Invasion of Races?

Martian Invasion of Races leads this ranking on flat grade share (96.8%).

Compare Martian Invasion of Races vs Regensburg Marathon

#RaceFlat grade shareAscentClimb densityDescentNet elevationMax absolute gradeAs of
1Martian Invasion of Races 26K - michigan96.8%65 m2.5 m/km65 m0 m5.4%
2Regensburg Marathon 32K - germany94.2%92 m2.9 m/km91 m0 m6.4%
3Termal Bologna Marathon 30K - italy89.6%142 m4.7 m/km126 m16 m7.2%
4Red, White and Blue Half Marathon - Shreveport 4 Mile - louisiana88.8%32 m5.0 m/km32 m0 m4.2%
5Crazylegs Classic 8K (Madison) 2 Mile - wisconsin87.9%15 m4.8 m/km19 m-4 m3.1%
6Lundaloppet 2.5 km - sweden83.8%16 m6.4 m/km13 m3 m5.6%
7The Pistol Ultra (Alcoa) 32K - tennessee82.8%173 m5.4 m/km173 m-0 m11.7%
8Tupelo Marathon 23K - mississippi78.2%135 m5.9 m/km134 m1 m7.1%
9Courses de Strasbourg Eurométropole 31K - france75.1%232 m7.5 m/km225 m7 m12.8%
10Büchl Éjszakai Félmaraton (Győr) 14K - hungary72.5%96 m6.8 m/km95 m1 m7.2%
11SPARKASSE 3-Länder-Marathon (Bregenz) 11K - austria68.1%88 m8.1 m/km84 m3 m11.9%
12Spokane River Run 25K - washington63.0%326 m13.1 m/km326 m0 m21.0%
13Annapolis Striders Metric Marathon (Harwood) 26K - maryland61.9%245 m9.4 m/km245 m-0 m10.3%
14Bewl 15 (Wadhurst) 24K - south-east61.6%273 m11.3 m/km273 m-0 m20.1%
156 sjöar (Uppsala) 5.5 km - sweden59.1%65 m11.8 m/km63 m3 m18.8%
16Course de l'Escalade (Genève) 7.3 km - switzerland58.5%91 m12.4 m/km96 m-4 m10.9%
17The Skippo Trail Race 30K - missouri54.8%454 m15.1 m/km453 m0 m25.2%
18TCS Lidingöloppet 30K - sweden50.6%372 m12.4 m/km377 m-5 m13.2%
19Behind the Rocks Ultra 30K - utah43.3%457 m15.2 m/km457 m0 m21.5%
20Bill Powers Memorial Firecracker 4-Miler (Brattleboro) 4 Mile - vermont41.0%91 m14.2 m/km130 m-39 m19.2%
21NUTS Karhunkierros 36K - finland38.2%697 m19.6 m/km570 m127 m21.4%
22The Maverick Peak District Trail (Bakewell) 28K - east-midlands36.5%589 m21.0 m/km589 m0 m24.9%
23Otter Creek Trail Run (Mandan) 6K - north-dakota36.2%91 m15.7 m/km92 m-1 m12.3%
24Telekom Vivicittá (Budapest) 7K - hungary31.2%136 m19.4 m/km136 m0 m17.3%
25Etape Bornholm 8.6 km - denmark30.6%222 m25.8 m/km154 m68 m19.7%
26The Arctic Triple // Lofoten Ultra-Trail 24K - norway28.7%1,305 m54.4 m/km1,317 m-11 m91.0%
27Ethias 15 km de Liège Métropole 24K - belgium27.6%759 m31.6 m/km806 m-47 m39.7%
28Volvic Volcanic Experience (VVX) 24K - france27.5%644 m26.8 m/km644 m0 m44.8%
29Endurancelife Coastal Trail Series - North York Moors (Ravenscar) 24K - yorkshire27.0%598 m24.8 m/km598 m-0 m27.1%
30Round Sheffield Run 25K - yorkshire26.3%574 m23.4 m/km575 m-1 m35.2%
31Plitvički maraton (Plitvice Marathon) 9K - croatia25.7%157 m17.4 m/km154 m2 m6.7%
32Wolf Creek Wrangle Trail Run 11K - wyoming24.4%485 m43.1 m/km484 m1 m60.7%
33Soča Outdoor Festival 34K - slovenia23.7%1,511 m44.3 m/km1,520 m-9 m47.7%
34Salomon Ultra-Trail Hungary 30K - hungary23.1%1,057 m35.5 m/km1,116 m-59 m46.0%
35Douro Ultra Trail (Peso da Régua) 28K - portugal22.7%1,010 m36.1 m/km1,218 m-208 m46.3%
36Dalmacija Ultra Trail 29K - croatia21.1%1,141 m39.2 m/km1,185 m-44 m49.7%
37Ultra Trail Učka 13K - croatia20.7%609 m46.8 m/km608 m-0 m40.6%
38Escape from Prison Hill (Carson City) 11K - nevada20.6%407 m37.0 m/km403 m4 m30.3%
39Sleeping Giant Trail Runs 25K - connecticut20.4%1,025 m41.0 m/km1,029 m-4 m54.8%
40Tenerife Bluetrail by UTMB 24K - spain19.2%1,219 m50.8 m/km1,907 m-688 m54.4%
41Kia Fjällmaraton (Fjällmaratonveckan), Årefjällen 27K - sweden19.2%869 m32.2 m/km996 m-127 m30.6%
42Ultra Trail Vipava Valley (UTVV), Ajdovščina 30K - slovenia19.0%1,697 m56.6 m/km1,697 m1 m59.1%
43Sinks Canyon Rough and Tumble Trail Races 18K - wyoming17.3%UnavailableUnavailableUnavailable5 mUnavailable
44adidas Innsbruck Alpine Trailrun Festival 38K - austria16.2%2,101 m55.6 m/km2,474 m-372 m60.1%
45Slovenski gozdarski trail 34K - slovenia15.8%1,336 m39.3 m/km1,335 m1 m40.6%
46Marathon du Mont-Blanc, Chamonix 23K - france15.0%1,641 m71.3 m/km634 m1,007 m35.0%
47Sljemenski Maraton (Zagreb) 14K - croatia14.1%749 m53.5 m/km751 m-2 m54.1%
48Unicaja Ultra Sierra Nevada 25K - spain13.8%1,929 m77.2 m/km562 m1,368 m49.3%
49ROUT Classic 100 Miles (Rodopi Ultra Trail) 24K - greece13.2%1,075 m44.8 m/km1,027 m48 m58.1%
50Garda Trentino Trail 29K - italy12.8%1,517 m53.0 m/km1,518 m-0 m47.6%
51Var Verdon Trail Canyon 24K - france12.4%1,468 m61.2 m/km1,464 m4 m54.2%
52Stranda Fjord Trail Race 25K - norway12.4%1,901 m76.0 m/km1,911 m-11 m70.3%
53Dolomiti Extreme Trail 35K - italy11.5%3,503 m100.1 m/km3,502 m1 m81.2%
54Zagori Mountain Running (ZMR) 33K - greece11.1%1,955 m59.3 m/km1,959 m-3 m43.5%
55STE - Caravela Seguros Sintra Trail X'treme 33K - portugal11.1%1,820 m55.1 m/km1,820 m-0 m50.0%
56Podbrdo Trail Running Festival 23K - slovenia10.1%1,577 m68.6 m/km1,603 m-26 m56.0%
57The North Face Grossglockner Ultra-Trail 37K - austria10.1%3,381 m91.4 m/km3,949 m-568 m65.8%
58Carson Canyons Super-K Trail Runs 6K - nevada8.5%256 m42.7 m/km253 m3 m25.7%
59Chudy Wawrzyniec (Rajcza) 3K - poland3.4%387 m133.4 m/km19 m368 m43.4%
60Zegama-Aizkorri Mendi Maratoia 3K - spain1.7%937 m312.5 m/km7 m931 m67.5%
1
Martian Invasion of Races 26Kmichigan
Flat grade share
96.8%
Ascent
65 m
Climb density
2.5 m/km
Descent
65 m
Net elevation
0 m
Max absolute grade
5.4%

As of

2
Regensburg Marathon 32Kgermany
Flat grade share
94.2%
Ascent
92 m
Climb density
2.9 m/km
Descent
91 m
Net elevation
0 m
Max absolute grade
6.4%

As of

3
Termal Bologna Marathon 30Kitaly
Flat grade share
89.6%
Ascent
142 m
Climb density
4.7 m/km
Descent
126 m
Net elevation
16 m
Max absolute grade
7.2%

As of

6
Lundaloppet 2.5 kmsweden
Flat grade share
83.8%
Ascent
16 m
Climb density
6.4 m/km
Descent
13 m
Net elevation
3 m
Max absolute grade
5.6%

As of

7
The Pistol Ultra (Alcoa) 32Ktennessee
Flat grade share
82.8%
Ascent
173 m
Climb density
5.4 m/km
Descent
173 m
Net elevation
-0 m
Max absolute grade
11.7%

As of

8
Tupelo Marathon 23Kmississippi
Flat grade share
78.2%
Ascent
135 m
Climb density
5.9 m/km
Descent
134 m
Net elevation
1 m
Max absolute grade
7.1%

As of

12
Spokane River Run 25Kwashington
Flat grade share
63.0%
Ascent
326 m
Climb density
13.1 m/km
Descent
326 m
Net elevation
0 m
Max absolute grade
21.0%

As of

14
Bewl 15 (Wadhurst) 24Ksouth-east
Flat grade share
61.6%
Ascent
273 m
Climb density
11.3 m/km
Descent
273 m
Net elevation
-0 m
Max absolute grade
20.1%

As of

15
6 sjöar (Uppsala) 5.5 kmsweden
Flat grade share
59.1%
Ascent
65 m
Climb density
11.8 m/km
Descent
63 m
Net elevation
3 m
Max absolute grade
18.8%

As of

17
The Skippo Trail Race 30Kmissouri
Flat grade share
54.8%
Ascent
454 m
Climb density
15.1 m/km
Descent
453 m
Net elevation
0 m
Max absolute grade
25.2%

As of

18
TCS Lidingöloppet 30Ksweden
Flat grade share
50.6%
Ascent
372 m
Climb density
12.4 m/km
Descent
377 m
Net elevation
-5 m
Max absolute grade
13.2%

As of

19
Behind the Rocks Ultra 30Kutah
Flat grade share
43.3%
Ascent
457 m
Climb density
15.2 m/km
Descent
457 m
Net elevation
0 m
Max absolute grade
21.5%

As of

21
NUTS Karhunkierros 36Kfinland
Flat grade share
38.2%
Ascent
697 m
Climb density
19.6 m/km
Descent
570 m
Net elevation
127 m
Max absolute grade
21.4%

As of

23
Otter Creek Trail Run (Mandan) 6Knorth-dakota
Flat grade share
36.2%
Ascent
91 m
Climb density
15.7 m/km
Descent
92 m
Net elevation
-1 m
Max absolute grade
12.3%

As of

24
Telekom Vivicittá (Budapest) 7Khungary
Flat grade share
31.2%
Ascent
136 m
Climb density
19.4 m/km
Descent
136 m
Net elevation
0 m
Max absolute grade
17.3%

As of

25
Etape Bornholm 8.6 kmdenmark
Flat grade share
30.6%
Ascent
222 m
Climb density
25.8 m/km
Descent
154 m
Net elevation
68 m
Max absolute grade
19.7%

As of

30
Round Sheffield Run 25Kyorkshire
Flat grade share
26.3%
Ascent
574 m
Climb density
23.4 m/km
Descent
575 m
Net elevation
-1 m
Max absolute grade
35.2%

As of

32
Wolf Creek Wrangle Trail Run 11Kwyoming
Flat grade share
24.4%
Ascent
485 m
Climb density
43.1 m/km
Descent
484 m
Net elevation
1 m
Max absolute grade
60.7%

As of

33
Soča Outdoor Festival 34Kslovenia
Flat grade share
23.7%
Ascent
1,511 m
Climb density
44.3 m/km
Descent
1,520 m
Net elevation
-9 m
Max absolute grade
47.7%

As of

34
Salomon Ultra-Trail Hungary 30Khungary
Flat grade share
23.1%
Ascent
1,057 m
Climb density
35.5 m/km
Descent
1,116 m
Net elevation
-59 m
Max absolute grade
46.0%

As of

36
Dalmacija Ultra Trail 29Kcroatia
Flat grade share
21.1%
Ascent
1,141 m
Climb density
39.2 m/km
Descent
1,185 m
Net elevation
-44 m
Max absolute grade
49.7%

As of

37
Ultra Trail Učka 13Kcroatia
Flat grade share
20.7%
Ascent
609 m
Climb density
46.8 m/km
Descent
608 m
Net elevation
-0 m
Max absolute grade
40.6%

As of

39
Sleeping Giant Trail Runs 25Kconnecticut
Flat grade share
20.4%
Ascent
1,025 m
Climb density
41.0 m/km
Descent
1,029 m
Net elevation
-4 m
Max absolute grade
54.8%

As of

40
Tenerife Bluetrail by UTMB 24Kspain
Flat grade share
19.2%
Ascent
1,219 m
Climb density
50.8 m/km
Descent
1,907 m
Net elevation
-688 m
Max absolute grade
54.4%

As of

45
Slovenski gozdarski trail 34Kslovenia
Flat grade share
15.8%
Ascent
1,336 m
Climb density
39.3 m/km
Descent
1,335 m
Net elevation
1 m
Max absolute grade
40.6%

As of

47
Sljemenski Maraton (Zagreb) 14Kcroatia
Flat grade share
14.1%
Ascent
749 m
Climb density
53.5 m/km
Descent
751 m
Net elevation
-2 m
Max absolute grade
54.1%

As of

48
Unicaja Ultra Sierra Nevada 25Kspain
Flat grade share
13.8%
Ascent
1,929 m
Climb density
77.2 m/km
Descent
562 m
Net elevation
1,368 m
Max absolute grade
49.3%

As of

50
Garda Trentino Trail 29Kitaly
Flat grade share
12.8%
Ascent
1,517 m
Climb density
53.0 m/km
Descent
1,518 m
Net elevation
-0 m
Max absolute grade
47.6%

As of

51
Var Verdon Trail Canyon 24Kfrance
Flat grade share
12.4%
Ascent
1,468 m
Climb density
61.2 m/km
Descent
1,464 m
Net elevation
4 m
Max absolute grade
54.2%

As of

52
Stranda Fjord Trail Race 25Knorway
Flat grade share
12.4%
Ascent
1,901 m
Climb density
76.0 m/km
Descent
1,911 m
Net elevation
-11 m
Max absolute grade
70.3%

As of

53
Dolomiti Extreme Trail 35Kitaly
Flat grade share
11.5%
Ascent
3,503 m
Climb density
100.1 m/km
Descent
3,502 m
Net elevation
1 m
Max absolute grade
81.2%

As of

54
Zagori Mountain Running (ZMR) 33Kgreece
Flat grade share
11.1%
Ascent
1,955 m
Climb density
59.3 m/km
Descent
1,959 m
Net elevation
-3 m
Max absolute grade
43.5%

As of

56
Podbrdo Trail Running Festival 23Kslovenia
Flat grade share
10.1%
Ascent
1,577 m
Climb density
68.6 m/km
Descent
1,603 m
Net elevation
-26 m
Max absolute grade
56.0%

As of

59
Chudy Wawrzyniec (Rajcza) 3Kpoland
Flat grade share
3.4%
Ascent
387 m
Climb density
133.4 m/km
Descent
19 m
Net elevation
368 m
Max absolute grade
43.4%

As of

60 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

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (62)

Read the full methodology →

Common questions

What is the flattest others?

Martian Invasion of Races 26K ranks first by flat grade share, from 60 qualifying races compared under our published methodology.