Flattest ultramarathon route maps

Name: Flattest ultramarathon route maps data
Creator: raceindex.org

Which mapped route leads?

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet) currently leads this mapped-route ranking on flat grade share (100.0%).

110Qualifying routes110Elevation profiles100%Profile share100.0%Top metric

Ranked mapped pages

Featured ultramarathon route maps

All ultramarathon route maps →

12 DECMAP

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet)

Florida

Next race12 Dec 2026

Map
Profile
Character

GPS trace: 596 pts / daytona100ultra.com

Flat
Coastal
Island
Canyon

Ascent: 39 m
m/km: 0.2 m/km

100.0%Flat grade share

08 AUGMAP

North Downs Way 100

South East

Next race8 Aug 2026

Map
Profile
Cost
Character

GPS trace: 139 pts / centurionrunning.com

Hilly
Countryside
Forest
Riverside

Ascent: 155 m
m/km: 0.9 m/km

97.3%Flat grade share£220Entry

11 OCTMAP

Bath & Bristol Railway Races

South West

Next race11 Oct 2026

Map
Profile
Cost
Character

GPS trace: 973 pts / www.relishrunningraces.com

Flat
Riverside
Countryside
Historic

Ascent: 136 m
m/km: 2.7 m/km

96.7%Flat grade share£65Entry

11 SEPMAP

Wasatch Front 100 Mile Endurance Run

Utah

Next race11 Sep 2026

Map
Profile
Character

GPS trace: 1,165 pts / wasatch100.com

Mountainous
Mountain
Forest
Countryside

Ascent: 1,256 m
m/km: 7.8 m/km

96.5%Flat grade share

25 OCTMAP

Stort30

East Of England

Next race25 Oct 2026

Map
Profile
Cost
Character

GPS trace: 542 pts / www.challenge-running.com

Pancake Flat
Riverside
Countryside
Towpath

Ascent: 99 m
m/km: 2.0 m/km

95.8%Flat grade share£55Entry

01 MAYMAP

Thames Path 100

South East

Next race1 May 2027

Map
Profile
Cost
Character

GPS trace: 813 pts / centurionrunning.com

Flat
Riverside
Countryside
City

Ascent: 222 m
m/km: 1.4 m/km

94.4%Flat grade share£225Entry

13 MARMAP

The Pistol Ultra (Alcoa)

Tennessee

Next race13 Mar 2027

Map
Profile
Character

GPS trace: 1,471 pts / www.pistolultra.com

Gently Rolling
Waterfront
Lakeside
Forest

Ascent: 696 m
m/km: 4.3 m/km

86.2%Flat grade share

10 OCTMAP

Endurancelife Suffolk (Dunwich)

East Of England

Next race10 Oct 2026

Map
Profile
Cost
Character

GPS trace: 513 pts / www.endurancelife.com

Coastal
Parkland
Historic
Forest

Ascent: 247 m
m/km: 4.7 m/km

84.9%Flat grade share£71Entry

13 JUNMAP

Kettle Moraine 100 Endurance Runs

Wisconsin

Latest edition13 Jun 2026

Map
Profile
Character

GPS trace: 1,114 pts / www.kettlemoraine100.com

Rolling
Forest
Countryside
Lakeside

Ascent: 1,034 m
m/km: 6.4 m/km

78.6%Flat grade share

UltramarathonMAP

NN Ultrabalaton

Hungary

Map
Profile
Character

GPS trace: 1,482 pts / ultrabalaton.hu

Gently Rolling
Lakeside
Coastal
Vineyard

Ascent: 3,407 m
m/km: 8.2 m/km

73.0%Flat grade share

17 OCTMAP

Autumn 100

South East

Next race17 Oct 2026

Map
Profile
Cost
Character

GPS trace: 1,264 pts / centurionrunning.com

Gently Rolling
Countryside
Riverside
Forest

Ascent: 1,380 m
m/km: 8.6 m/km

70.6%Flat grade share£220Entry

10 APRMAP

Flint Hills 50 and Marathon

Kansas

Next race10 Apr 2027

Map
Profile
Character

GPS trace: 612 pts / ultrasignup.com

Countryside
Waterfront
Road
Trail

Ascent: 655 m
m/km: 8.1 m/km

68.1%Flat grade share

12 JUNMAP

The Wall

North East

Next race12 Jun 2027

Map
Profile
Cost
Character

GPS trace: 898 pts / www.ratrace.com

Rolling
Countryside
Waterfront
Historic

Ascent: 1,140 m
m/km: 10.2 m/km

63.7%Flat grade share£230Entry

12 SEPMAP

The Hawk Hundred (Lawrence)

Kansas

Next race12 Sep 2026

Map
Profile
Character

GPS trace: 1,187 pts / www.hawkhundred.com

Rolling
Parkland
Coastal
Forest

Ascent: 1,527 m
m/km: 9.5 m/km

60.6%Flat grade share

04 SEPMAP

Ring O' Fire

Wales

Next race4 Sep 2026

Map
Profile
Cost
Character

GPS trace: 1,105 pts / ringofire.co.uk

Hilly
Coastal
Mountain
Countryside

Ascent: 2,480 m
m/km: 11.9 m/km

60.3%Flat grade share£255Entry

18 APRMAP

Spokane River Run

Washington

Next race18 Apr 2027

Map
Profile
Character

GPS trace: 1,278 pts / runsignup.com

Hilly
Parkland
Riverside
City

Ascent: 925 m
m/km: 18.5 m/km

59.3%Flat grade share

25 APRMAP

Connemara International Marathon (Connemarathon)

Ireland

Next race25 Apr 2027

Map
Profile
Character

GPS trace: 1,252 pts / www.connemarathon.com

Countryside
Mountain
Lakeside
Moorland

Ascent: 755 m
m/km: 11.9 m/km

58.0%Flat grade share

19 JUNMAP

Race to the King

South East

Next race19 Jun 2027

Map
Profile
Cost
Character

GPS trace: 1,239 pts / www.thresholdtrailseries.com

Rolling
Coastal
Historic
Parkland

Ascent: 1,434 m
m/km: 13.9 m/km

57.0%Flat grade share£155Entry

10 SEPMAP

Run Woodstock

Michigan

Next race10 Sep 2026

Map
Profile
Character

GPS trace: 1,121 pts / www.runwoodstock.com

Gently Rolling
Parkland
Forest
Lakeside

Ascent: 1,764 m
m/km: 11.0 m/km

57.0%Flat grade share

17 APRMAP

Foot Levelers Blue Ridge Marathon

Virginia

Next race17 Apr 2027

Map
Profile
Character

GPS trace: 1,216 pts / blueridgemarathon.com

Mountain
City
Forest
Riverside

Ascent: 2,551 m
m/km: 30.2 m/km

57.0%Flat grade share

31 JULMAP

Lean Horse Ultra Marathon

South Dakota

Latest edition31 Jul 2026

Map
Profile
Character

GPS trace: 1,186 pts / leanhorseultra.com

Gently Rolling
Countryside
Waterfront
Forest

Ascent: 1,791 m
m/km: 11.1 m/km

56.8%Flat grade share

07 NOVMAP

TARC Stone Cat Trail Festival

Massachusetts

Next race7 Nov 2026

Map
Profile
Character

GPS trace: 1,167 pts / www.trailanimals.com

Rolling
Parkland
Coastal
Forest

Ascent: 1,094 m
m/km: 10.9 m/km

56.7%Flat grade share

11 JULMAP

Race to the Stones

South East

Latest edition11 Jul 2026

Map
Profile
Character

GPS trace: 1,099 pts / www.thresholdtrailseries.com

Gently Rolling
Forest
Riverside
Historic

Ascent: 1,260 m
m/km: 12.6 m/km

55.7%Flat grade share

06 FEBMAP

Rocky Raccoon 100 (Huntsville)

Texas

Next race6 Feb 2027

Map
Profile
Character

GPS trace: 1,140 pts / www.tejastrails.com

Gently Rolling
Forest
Parkland
Lakeside

Ascent: 1,880 m
m/km: 11.7 m/km

53.2%Flat grade share

24 JULMAP

Davos X-Trails

Switzerland

Latest edition24 Jul 2026

Map
Profile
Character

GPS trace: 1,061 pts / www.davos-xtrails.ch

Mountainous
Mountain
Forest
Countryside

Ascent: 3,372 m
m/km: 49.3 m/km

52.8%Flat grade share

26 SEPMAP

Gower Coastal Trail Races

Wales

Next race26 Sep 2026

Map
Profile
Cost
Character

GPS trace: 1,421 pts / www.runwalkcrawl.co.uk

Rolling
Coastal
Forest
Countryside

Ascent: 1,087 m
m/km: 13.5 m/km

52.0%Flat grade share£85Entry

13 JUNMAP

McKenzie River Trail Run 50K

Oregon

Latest edition13 Jun 2026

Map
Profile
Character

GPS trace: 1,201 pts / mrtr.org

Rolling
Riverside
Forest
Lakeside

Ascent: 535 m
m/km: 10.7 m/km

50.7%Flat grade share

10 OCTMAP

Reims Champagne Run

France

Next race10 Oct 2026

Map
Profile
Character

GPS trace: 1,277 pts / reimschampagnerun.fr

Hilly
Vineyard
City
Historic

Ascent: 1,343 m
m/km: 15.4 m/km

50.1%Flat grade share

13 FEBMAP

Holiday Lake 50K (Appomattox)

Virginia

Next race13 Feb 2027

Map
Profile
Character

GPS trace: 1,324 pts / enduranceeventsva.com

Rolling
Forest
Lakeside
Countryside

Ascent: 810 m
m/km: 16.2 m/km

49.9%Flat grade share

UltramarathonMAP

Ice Age Trail 50

Wisconsin

Map
Profile
Character

GPS trace: 1,470 pts / iceagetrail50.com

Rolling
Desert
Countryside
Forest

Ascent: 1,263 m
m/km: 15.7 m/km

47.8%Flat grade share

09 JANMAP

HOKA Bandera Endurance Trail Race

Texas

Next race9 Jan 2027

Map
Profile
Character

GPS trace: 1,234 pts / www.tejastrails.com

Hilly
Countryside
Forest
Trail

Ascent: 1,711 m
m/km: 17.1 m/km

47.7%Flat grade share

16 OCTMAP

Lake Tahoe Marathon

Nevada

Next race16 Oct 2026

Map
Profile
Character

GPS trace: 1,356 pts / www.laketahoemarathon.com

Coastal
Lakeside
Mountain
Forest

Ascent: 1,912 m
m/km: 16.5 m/km

46.7%Flat grade share

13 JUNMAP

Cairngorms Ultra Trail

Scotland

Latest edition13 Jun 2026

Map
Profile
Cost
Character

GPS trace: 1,411 pts / www.highterrainevents.co.uk

Hilly
Mountain
Countryside
Parkland

Ascent: 948 m
m/km: 15.8 m/km

46.5%Flat grade share£67Entry

23 AUGMAP

Gravel Worlds Run Series (Lincoln)

Nebraska

Next race23 Aug 2026

Map
Profile
Character

GPS trace: 1,436 pts / www.gravelworlds.com

Rolling
Countryside
City
Gravel

Ascent: 589 m
m/km: 11.8 m/km

46.0%Flat grade share

25 JULMAP

Minnesota Voyageur Trail Ultramarathon

Minnesota

Latest edition25 Jul 2026

Map
Profile
Character

GPS trace: 1,136 pts / nmtc.run

Hilly
Lakeside
Riverside
Parkland

Ascent: 1,484 m
m/km: 18.4 m/km

45.8%Flat grade share

20 JUNMAP

West Highland Way Race

Scotland

Latest edition20 Jun 2026

Map
Profile
Cost
PB

GPS trace: 1,387 pts / westhighlandwayrace.org

Mountainous
Mountain
Countryside
Forest

Ascent: 2,703 m
m/km: 17.7 m/km

45.8%Flat grade share£157Entry

12 JULMAP

Norfolk Festival of Running (King's Lynn)

East Of England

Latest edition12 Jul 2026

Map
Profile
Cost
Character

GPS trace: 1,161 pts / www.zigzagrunning.co.uk

Parkland
Countryside
Lakeside
Forest

Ascent: 627 m
m/km: 12.5 m/km

45.4%Flat grade share£38Entry

31 OCTMAP

Javelina Jundred

Arizona

Next race31 Oct 2026

Map
Profile
Character

GPS trace: 1,339 pts / www.aravaiparunning.com

Rolling
Desert
Countryside
Mountain

Ascent: 3,626 m
m/km: 22.5 m/km

45.3%Flat grade share

20 MARMAP

Chuckanut 50k

Washington

Next race20 Mar 2027

Map
Profile
Character

GPS trace: 1,484 pts / chuckanut50krace.com

Mountainous
Mountain
City
Countryside

Ascent: 1,416 m
m/km: 28.3 m/km

40.7%Flat grade share

28 MAYMAP

The Arctic Triple // Lofoten Ultra-Trail

Norway

Latest edition28 May 2026

Map
Profile
Character

GPS trace: 1,435 pts / thearctictriple.no

Mountainous
Coastal
Mountain
Waterfront

Ascent: 5,472 m
m/km: 33.5 m/km

39.8%Flat grade share

30 MAYMAP

Mohican Trail 100 Mile Run

Ohio

Latest edition30 May 2026

Map
Profile
Character

GPS trace: 1,421 pts / www.ombc.net

Hilly
Countryside
Forest
Waterfront

Ascent: 2,890 m
m/km: 18.0 m/km

39.6%Flat grade share

19 SEPMAP

Chiltern Wonderland 50

South East

Next race19 Sep 2026

Map
Profile
Cost
Character

GPS trace: 1,399 pts / centurionrunning.com

Hilly
Countryside
Riverside
Forest

Ascent: 1,699 m
m/km: 21.0 m/km

38.8%Flat grade share£115Entry

22 AUGMAP

Leadville Trail 100 Run

Colorado

Next race22 Aug 2026

Map
Profile
Character

GPS trace: 1,443 pts / www.leadvilleraceseries.com

Mountainous
Mountain
Countryside
Forest

Ascent: 4,444 m
m/km: 27.7 m/km

38.1%Flat grade share

18 OCTMAP

Bimbler's Bluff 50K

Connecticut

Next race18 Oct 2026

Map
Profile
Character

GPS trace: 1,403 pts / www.bimblersound.com

Hilly
Forest
Countryside
Parkland

Ascent: 1,092 m
m/km: 21.8 m/km

37.9%Flat grade share

29 AUGMAP

Highland Fling Race (Milngavie)

Scotland

Next race29 Aug 2026

Map
Profile
Cost
Character

GPS trace: 1,325 pts / www.highlandflingrace.org

Hilly
Mountain
Lakeside
Coastal

Ascent: 1,939 m
m/km: 22.8 m/km

37.2%Flat grade share£125Entry

16 AUGMAP

Two Tunnels Railway Races

South West

Next race16 Aug 2026

Map
Profile
Cost
Character

GPS trace: 820 pts / www.relishrunningraces.com

Parkland
Countryside
Riverside
City

Ascent: 1,231 m
m/km: 24.6 m/km

35.9%Flat grade share£65Entry

06 JUNMAP

Endurancelife Classic Quarter (Cornwall Coastal Ultra)

South West

Latest edition6 Jun 2026

Map
Profile
Character

GPS trace: 1,430 pts / www.endurancelife.com

Hilly
Coastal
Waterfront
Countryside

Ascent: 1,916 m
m/km: 27.1 m/km

35.6%Flat grade share

22 JANMAP

Arc of Attrition

South West

Next race22 Jan 2027

Map
Profile
Cost
Character

GPS trace: 1,367 pts / arcofattrition.utmb.world

Hilly
Coastal
Waterfront
Countryside

Ascent: 4,116 m
m/km: 25.5 m/km

35.4%Flat grade share£239Entry

More flattest ultramarathon route maps

Direct links after the featured cards, limited to mapped ultramarathon race pages with a publishable flat grade share value.

49Gornergrat Zermatt MarathonFlat grade share 34.8% | Zermatt, switzerland | elevation profile
50South Downs Way 100Flat grade share 34.7% | Winchester to Eastbourne, south-east | elevation profile
51Montane Winter Spine RaceFlat grade share 34.1% | Edale to Kirk Yetholm, north-east | elevation profile
52Tecumseh Trail Marathon (Tecumseh Trail Challenge), Nashville IndianaFlat grade share 32.8% | Nashville, indiana | elevation profile
53Endurancelife PembrokeshireFlat grade share 32.6% | Little Haven, wales | elevation profile
54Maah Daah Hey Trail Run (Medora)Flat grade share 31.8% | Medora, north-dakota | elevation profile
55Sheltowee Trace Ultras (Big Turtle Trail Runs), MoreheadFlat grade share 30.8% | Morehead, kentucky | elevation profile
56Wicklow Way RaceFlat grade share 30.4% | Dublin, ireland | elevation profile
57Endurancelife Coastal Trail Series - North York Moors (Ravenscar)Flat grade share 30.1% | Ravenscar, yorkshire | elevation profile
58Devil o' the Highlands FootraceFlat grade share 29.8% | Tyndrum, scotland | elevation profile
59Ultra Trail Vipava Valley (UTVV), AjdovščinaFlat grade share 27.7% | Ajdovščina, slovenia | elevation profile
60Ethias 15 km de Liège MétropoleFlat grade share 27.5% | Liège, belgium | elevation profile
61Kia Fjällmaraton (Fjällmaratonveckan), ÅrefjällenFlat grade share 27.4% | Årefjällen, sweden | elevation profile
62Patapsco Valley 50KFlat grade share 26.0% | Catonsville, maryland | elevation profile
63Wild Duluth RacesFlat grade share 25.7% | Duluth, minnesota | elevation profile
64Worlds End UltramarathonFlat grade share 25.4% | Forksville, pennsylvania | elevation profile
65Beachy Head MarathonFlat grade share 25.3% | Eastbourne, south-east | elevation profile
66Gorge Waterfalls 100KFlat grade share 25.3% | Cascade Locks, oregon | elevation profile
67The Malvern Hills UltraFlat grade share 24.3% | Abberley, west-midlands | elevation profile
68Massanutten Mountain Trails 100 Mile RunFlat grade share 24.0% | Fort Valley, virginia | elevation profile
69Volvic Volcanic Experience (VVX)Flat grade share 22.0% | Volvic, france | elevation profile
70Sinks Canyon Rough and Tumble Trail RacesFlat grade share 22.0% | Lander, wyoming | elevation profile
71adidas Innsbruck Alpine Trailrun FestivalFlat grade share 21.9% | Innsbruck, austria | elevation profile
72Soča Outdoor FestivalFlat grade share 21.8% | Tolmin, slovenia | elevation profile
73Tahoe 200 Endurance RunFlat grade share 21.7% | South Lake Tahoe, california | elevation profile
74Tollymore Extreme (Tollymore Trail Marathon), NewcastleFlat grade share 21.6% | Newcastle, northern-ireland | elevation profile
75Salomon Ultra-Trail HungaryFlat grade share 20.7% | Szentendre, hungary | elevation profile
76Sleeping Giant Trail RunsFlat grade share 20.5% | Hamden, connecticut | elevation profile
77Cascade Crest 100Flat grade share 20.3% | Easton, washington | elevation profile
78MIUT - Madeira Island Ultra-TrailFlat grade share 19.9% | Machico, portugal | elevation profile
79Western States Endurance RunFlat grade share 19.8% | Olympic Valley to Auburn, california | elevation profile
80Run Rabbit Run 50 & 100 Mile RaceFlat grade share 19.6% | Steamboat Springs, colorado | elevation profile
81Endurancelife Peak District (Castleton)Flat grade share 19.3% | Castleton, east-midlands | elevation profile
82ROUT Classic 100 Miles (Rodopi Ultra Trail)Flat grade share 18.8% | Haidou (Dasiko Horio Erymanthos), Stavroupoli, Xanthi, Rodopi National Park, greece | elevation profile
83FUGA Penyagolosa Trails (Castelló)Flat grade share 18.3% | Castellón de la Plana, spain | elevation profile
84Tahoe Rim Trail Endurance RunsFlat grade share 17.3% | Carson City, nevada | elevation profile
85Dalmacija Ultra TrailFlat grade share 16.9% | Omiš, croatia | elevation profile
86Running with the Devil (Las Vegas)Flat grade share 16.9% | Las Vegas, nevada | elevation profile
87Tamalpa Headlands 50KFlat grade share 16.8% | Muir Beach, california | elevation profile
88The North Face Grossglockner Ultra-TrailFlat grade share 16.5% | Kaprun, austria | elevation profile
89SciaccheTrail – Cinque Terre Ultra TrailFlat grade share 16.2% | Riomaggiore / Monterosso al Mare, Cinque Terre, La Spezia, Liguria, italy | elevation profile
90Manitou's Revenge UltramarathonFlat grade share 16.0% | Windham, new-york | elevation profile
91Ultra-Trail Snowdonia by UTMBFlat grade share 15.8% | Llanberis, wales | elevation profile
92Tatra SkyMarathon (Zakopane)Flat grade share 15.5% | Zakopane, poland | elevation profile
93Silver State 50/50 (Reno)Flat grade share 15.2% | Reno, nevada | elevation profile
94Douro Ultra Trail (Peso da Régua)Flat grade share 15.0% | Peso da Régua, portugal | elevation profile
95Ultra Trail UčkaFlat grade share 14.8% | Mošćenička Draga, croatia | elevation profile
96Dolomiti Extreme TrailFlat grade share 14.7% | Forno di Zoldo, Val di Zoldo, italy | elevation profile
97Unicaja Ultra Sierra NevadaFlat grade share 14.6% | Granada, spain | elevation profile
98Hardrock Hundred Mile Endurance RunFlat grade share 14.2% | Silverton, colorado | elevation profile
99Stranda Fjord Trail RaceFlat grade share 13.9% | Stranda, norway | elevation profile
100Bieg Rzeźnika (Cisna)Flat grade share 13.4% | Cisna, poland | elevation profile
101HOKA UTMB Mont-BlancFlat grade share 13.0% | Chamonix-Mont-Blanc, Haute-Savoie, france | elevation profile
102Scout Mountain UltrasFlat grade share 12.8% | Pocatello, idaho | elevation profile
103Tenerife Bluetrail by UTMBFlat grade share 12.7% | Puerto de la Cruz, spain | elevation profile
104Chudy Wawrzyniec (Rajcza)Flat grade share 12.2% | Rajcza, poland | elevation profile
105TransvulcaniaFlat grade share 11.7% | Fuencaliente / Los Llanos de Aridane, La Palma, Canary Islands, spain | elevation profile
106Dolomiti di Brenta Trail (Molveno)Flat grade share 11.2% | Molveno, italy | elevation profile
107Podbrdo Trail Running FestivalFlat grade share 10.5% | Podbrdo, slovenia | elevation profile
108Eiger Ultra Trail by UTMBFlat grade share 9.0% | Grindelwald, switzerland | elevation profile
109Zagori Mountain Running (ZMR)Flat grade share 8.7% | Tsepelovo, Zagori, Ioannina, greece | elevation profile
110SkyRun the MournesFlat grade share 8.6% | Newcastle, northern-ireland | elevation profile

How flattest ultramarathon route maps qualify

A race appears in a route-map collection only when raceindex.org has stored route geometry. Elevation, ascent and GAP values appear only when the route has enough elevation-bearing evidence for a publishable profile; unsupported signals are omitted.

Flattest ultramarathon route map questions

What qualifies for flattest ultramarathon route maps?

A ultramarathon race must have stored route geometry and a publishable flat grade share value to appear in this ranking.

Why are some mapped ultramarathon races missing from this ranking?

Mapped races can be missing an elevation-derived metric when their stored route lacks enough elevation-bearing evidence. Unsupported route metrics are omitted rather than inferred.

Which ultramarathon race leads this mapped-route ranking?

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet) leads this route-map ranking with flat grade share 100.0%.

Loading page

Which mapped route leads?

Featured ultramarathon route maps

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet)

North Downs Way 100

Bath & Bristol Railway Races

Wasatch Front 100 Mile Endurance Run

Stort30

Thames Path 100

The Pistol Ultra (Alcoa)

Endurancelife Suffolk (Dunwich)

Kettle Moraine 100 Endurance Runs

NN Ultrabalaton

Autumn 100

Flint Hills 50 and Marathon

The Wall

The Hawk Hundred (Lawrence)

Ring O' Fire

Spokane River Run

Connemara International Marathon (Connemarathon)

Race to the King

Run Woodstock

Foot Levelers Blue Ridge Marathon

Lean Horse Ultra Marathon

TARC Stone Cat Trail Festival

Race to the Stones

Rocky Raccoon 100 (Huntsville)

Davos X-Trails

Gower Coastal Trail Races

McKenzie River Trail Run 50K

Reims Champagne Run

Holiday Lake 50K (Appomattox)

Ice Age Trail 50

HOKA Bandera Endurance Trail Race

Lake Tahoe Marathon

Cairngorms Ultra Trail

Gravel Worlds Run Series (Lincoln)

Minnesota Voyageur Trail Ultramarathon

West Highland Way Race

Norfolk Festival of Running (King's Lynn)

Javelina Jundred

Chuckanut 50k

The Arctic Triple // Lofoten Ultra-Trail

Mohican Trail 100 Mile Run

Chiltern Wonderland 50

Leadville Trail 100 Run

Bimbler's Bluff 50K

Highland Fling Race (Milngavie)

Two Tunnels Railway Races

Endurancelife Classic Quarter (Cornwall Coastal Ultra)

Arc of Attrition

More flattest ultramarathon route maps

How flattest ultramarathon route maps qualify

Methodology

Data coverage

Flattest ultramarathon route map questions

What qualifies for flattest ultramarathon route maps?

Why are some mapped ultramarathon races missing from this ranking?

Which ultramarathon race leads this mapped-route ranking?

Which mapped route leads?

Featured ultramarathon route maps

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet)

North Downs Way 100

Bath & Bristol Railway Races

Wasatch Front 100 Mile Endurance Run

Stort30

Thames Path 100

The Pistol Ultra (Alcoa)

Endurancelife Suffolk (Dunwich)

Kettle Moraine 100 Endurance Runs

NN Ultrabalaton

Autumn 100

Flint Hills 50 and Marathon

The Wall

The Hawk Hundred (Lawrence)

Ring O' Fire

Spokane River Run

Connemara International Marathon (Connemarathon)

Race to the King

Run Woodstock

Foot Levelers Blue Ridge Marathon