Lowest GAP factor ultramarathon route maps

Name: Lowest GAP factor ultramarathon route maps data
Creator: raceindex.org

Which mapped route leads?

Sinks Canyon Rough and Tumble Trail Races currently leads this mapped-route ranking on gap (-61894901.5%).

110Qualifying routes110Elevation profiles100%Profile share-61894901.5%Top metric

Ranked mapped pages

Featured ultramarathon route maps

All ultramarathon route maps →

13 JUNMAP

Sinks Canyon Rough and Tumble Trail Races

Wyoming

Latest edition13 Jun 2026

Map
Profile
Character

GPS trace: 1,091 pts / www.landerrunning.org

Mountainous
Countryside
Mountain
Riverside

Ascent: 4,282 m
m/km: 85.6 m/km

-61894901.5%GAP

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

-7282928.1%GAP

10 JULMAP

Hardrock Hundred Mile Endurance Run

Colorado

Latest edition10 Jul 2026

Map
Profile
Character

GPS trace: 1,261 pts / hardrock100.com

Mountainous
Mountain
Forest
Lakeside

Ascent: 9,546 m
m/km: 59.3 m/km

-1692.2%GAP

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

-36.0%GAP

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

-1.5%GAP

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

-0.0%GAP

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

0.1%GAP£55Entry

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

0.1%GAP£65Entry

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

0.3%GAP£71Entry

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

0.4%GAP£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

0.4%GAP

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

0.4%GAP£220Entry

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

0.6%GAP

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

0.6%GAP

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

1.0%GAP

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

1.0%GAP£220Entry

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

1.1%GAP

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

1.2%GAP£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

1.2%GAP

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

1.3%GAP

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

1.3%GAP

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

1.4%GAP

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

1.6%GAP£38Entry

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

1.8%GAP

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

1.9%GAP

27 JUNMAP

Running with the Devil (Las Vegas)

Nevada

Latest edition27 Jun 2026

Map
Profile
Character

GPS trace: 981 pts / www.calicoracing.com

Countryside
Mountain
Forest
Desert

Ascent: 839 m
m/km: 16.8 m/km

2.0%GAP

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

2.0%GAP£85Entry

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

2.0%GAP£255Entry

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

2.6%GAP£155Entry

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

2.8%GAP

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

2.8%GAP£67Entry

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

2.9%GAP

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

3.1%GAP

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

3.2%GAP

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

3.5%GAP£157Entry

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

3.5%GAP

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

3.7%GAP

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

3.8%GAP

13 JUNMAP

South Downs Way 100

South East

Latest edition13 Jun 2026

Map
Profile
Cost
PB

GPS trace: 1,364 pts / centurionrunning.com

Rolling
Countryside
Historic
Forest

Ascent: 3,410 m
m/km: 21.2 m/km

4.1%GAP£220Entry

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

4.1%GAP

25 APRMAP

Devil o' the Highlands Footrace

Scotland

Latest edition25 Apr 2026

Map
Profile
Cost
Character

GPS trace: 1,424 pts / www.devilothehighlandsfootrace.co.uk

Mountainous
City
Mountain
Lakeside

Ascent: 1,641 m
m/km: 23.8 m/km

4.4%GAP£100Entry

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

4.7%GAP

24 JULMAP

Maah Daah Hey Trail Run (Medora)

North Dakota

Latest edition24 Jul 2026

Map
Profile
Character

GPS trace: 1,173 pts / www.experienceland.org

Rolling
Countryside
Waterfront
Canyon

Ascent: 2,080 m
m/km: 25.9 m/km

4.9%GAP

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

5.0%GAP£115Entry

25 APRMAP

Endurancelife Pembrokeshire

Wales

Latest edition25 Apr 2026

Map
Profile
Character

GPS trace: 1,445 pts / www.endurancelife.com

Hilly
Coastal
Parkland
Desert

Ascent: 1,270 m
m/km: 22.8 m/km

5.2%GAP

10 JANMAP

Montane Winter Spine Race

North East

Next race10 Jan 2027

Map
Profile
Character

GPS trace: 1,195 pts / www.thespinerace.com

Mountainous
Countryside
Mountain
Moorland

Ascent: 9,781 m
m/km: 22.7 m/km

5.4%GAP

05 JUNMAP

Sheltowee Trace Ultras (Big Turtle Trail Runs), Morehead

Kentucky

Next race5 Jun 2027

Map
Profile
Character

GPS trace: 1,485 pts / www.nextopportunityevents.com

Hilly
City
Countryside
Forest

Ascent: 1,187 m
m/km: 14.8 m/km

5.5%GAP

14 NOVMAP

Tollymore Extreme (Tollymore Trail Marathon), Newcastle

Northern Ireland

Next race14 Nov 2026

Map
Profile
Character

GPS trace: 609 pts / 26extreme.com

Countryside
Mountain
Forest
Historic

Ascent: 1,630 m
m/km: 25.9 m/km

5.5%GAP

More lowest gap factor ultramarathon route maps

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

49Two Tunnels Railway RacesGAP 5.6% | Bath, south-west | elevation profile
50Beachy Head MarathonGAP 5.7% | Eastbourne, south-east | elevation profile
51Endurancelife Coastal Trail Series - North York Moors (Ravenscar)GAP 5.7% | Ravenscar, yorkshire | elevation profile
52Western States Endurance RunGAP 5.7% | Olympic Valley to Auburn, california | elevation profile
53Tecumseh Trail Marathon (Tecumseh Trail Challenge), Nashville IndianaGAP 5.8% | Nashville, indiana | elevation profile
54Highland Fling Race (Milngavie)GAP 6.1% | Milngavie, scotland | elevation profile
55Rocky Raccoon 100 (Huntsville)GAP 6.2% | Huntsville, texas | elevation profile
56Ethias 15 km de Liège MétropoleGAP 6.4% | Liège, belgium | elevation profile
57Patapsco Valley 50KGAP 6.6% | Catonsville, maryland | elevation profile
58Wasatch Front 100 Mile Endurance RunGAP 6.7% | Kaysville, utah | elevation profile
59Arc of AttritionGAP 7.2% | Porthtowan, Cornwall, south-west | elevation profile
60Wild Duluth RacesGAP 8.0% | Duluth, minnesota | elevation profile
61Massanutten Mountain Trails 100 Mile RunGAP 8.1% | Fort Valley, virginia | elevation profile
62Endurancelife Classic Quarter (Cornwall Coastal Ultra)GAP 8.3% | Lizard, south-west | elevation profile
63Tahoe Rim Trail Endurance RunsGAP 8.4% | Carson City, nevada | elevation profile
64The Malvern Hills UltraGAP 8.5% | Abberley, west-midlands | elevation profile
65Chuckanut 50kGAP 8.6% | Bellingham, washington | elevation profile
66Silver State 50/50 (Reno)GAP 8.6% | Reno, nevada | elevation profile
67Leadville Trail 100 RunGAP 8.9% | Leadville, colorado | elevation profile
68Kia Fjällmaraton (Fjällmaratonveckan), ÅrefjällenGAP 9.8% | Årefjällen, sweden | elevation profile
69Worlds End UltramarathonGAP 10.4% | Forksville, pennsylvania | elevation profile
70Salomon Ultra-Trail HungaryGAP 10.8% | Szentendre, hungary | elevation profile
71Volvic Volcanic Experience (VVX)GAP 11.0% | Volvic, france | elevation profile
72Wicklow Way RaceGAP 11.0% | Dublin, ireland | elevation profile
73Scout Mountain UltrasGAP 11.3% | Pocatello, idaho | elevation profile
74Tamalpa Headlands 50KGAP 11.6% | Muir Beach, california | elevation profile
75Gorge Waterfalls 100KGAP 12.4% | Cascade Locks, oregon | elevation profile
76Cascade Crest 100GAP 13.8% | Easton, washington | elevation profile
77Sleeping Giant Trail RunsGAP 14.9% | Hamden, connecticut | elevation profile
78ROUT Classic 100 Miles (Rodopi Ultra Trail)GAP 15.5% | Haidou (Dasiko Horio Erymanthos), Stavroupoli, Xanthi, Rodopi National Park, greece | elevation profile
79SciaccheTrail – Cinque Terre Ultra TrailGAP 15.5% | Riomaggiore / Monterosso al Mare, Cinque Terre, La Spezia, Liguria, italy | elevation profile
80Ultra Trail Vipava Valley (UTVV), AjdovščinaGAP 15.7% | Ajdovščina, slovenia | elevation profile
81Endurancelife Peak District (Castleton)GAP 16.2% | Castleton, east-midlands | elevation profile
82The Arctic Triple // Lofoten Ultra-TrailGAP 16.9% | Svolvær, norway | elevation profile
83Tatra SkyMarathon (Zakopane)GAP 17.3% | Zakopane, poland | elevation profile
84Dalmacija Ultra TrailGAP 19.0% | Omiš, croatia | elevation profile
85adidas Innsbruck Alpine Trailrun FestivalGAP 19.4% | Innsbruck, austria | elevation profile
86Bieg Rzeźnika (Cisna)GAP 19.7% | Cisna, poland | elevation profile
87Soča Outdoor FestivalGAP 19.7% | Tolmin, slovenia | elevation profile
88Douro Ultra Trail (Peso da Régua)GAP 23.1% | Peso da Régua, portugal | elevation profile
89Ultra Trail UčkaGAP 23.6% | Mošćenička Draga, croatia | elevation profile
90FUGA Penyagolosa Trails (Castelló)GAP 23.8% | Castellón de la Plana, spain | elevation profile
91Chudy Wawrzyniec (Rajcza)GAP 24.8% | Rajcza, poland | elevation profile
92Manitou's Revenge UltramarathonGAP 25.0% | Windham, new-york | elevation profile
93TransvulcaniaGAP 25.1% | Fuencaliente / Los Llanos de Aridane, La Palma, Canary Islands, spain | elevation profile
94HOKA UTMB Mont-BlancGAP 27.5% | Chamonix-Mont-Blanc, Haute-Savoie, france | elevation profile
95Tenerife Bluetrail by UTMBGAP 27.7% | Puerto de la Cruz, spain | elevation profile
96Ultra-Trail Snowdonia by UTMBGAP 27.8% | Llanberis, wales | elevation profile
97Eiger Ultra Trail by UTMBGAP 29.8% | Grindelwald, switzerland | elevation profile
98The North Face Grossglockner Ultra-TrailGAP 29.9% | Kaprun, austria | elevation profile
99Dolomiti di Brenta Trail (Molveno)GAP 31.6% | Molveno, italy | elevation profile
100Podbrdo Trail Running FestivalGAP 31.9% | Podbrdo, slovenia | elevation profile
101Gornergrat Zermatt MarathonGAP 32.4% | Zermatt, switzerland | elevation profile
102Dolomiti Extreme TrailGAP 35.0% | Forno di Zoldo, Val di Zoldo, italy | elevation profile
103MIUT - Madeira Island Ultra-TrailGAP 39.2% | Machico, portugal | elevation profile
104Stranda Fjord Trail RaceGAP 43.7% | Stranda, norway | elevation profile
105SkyRun the MournesGAP 45.2% | Newcastle, northern-ireland | elevation profile
106Zagori Mountain Running (ZMR)GAP 117.8% | Tsepelovo, Zagori, Ioannina, greece | elevation profile
107Unicaja Ultra Sierra NevadaGAP 1064.1% | Granada, spain | elevation profile
108Javelina JundredGAP 32093.7% | Fountain Hills, arizona | elevation profile
109Tahoe 200 Endurance RunGAP 6617165.0% | South Lake Tahoe, california | elevation profile
110Run Rabbit Run 50 & 100 Mile RaceGAP 144114001.8% | Steamboat Springs, colorado | elevation profile

How lowest gap factor 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.

Lowest GAP factor ultramarathon route map questions

What qualifies for lowest gap factor ultramarathon route maps?

A ultramarathon race must have stored route geometry and a publishable gap 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?

Sinks Canyon Rough and Tumble Trail Races leads this route-map ranking with gap -61894901.5%.

Loading page

Which mapped route leads?

Featured ultramarathon route maps

Sinks Canyon Rough and Tumble Trail Races

Davos X-Trails

Hardrock Hundred Mile Endurance Run

Foot Levelers Blue Ridge Marathon

McKenzie River Trail Run 50K

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet)

Stort30

Bath & Bristol Railway Races

Endurancelife Suffolk (Dunwich)

Thames Path 100

The Pistol Ultra (Alcoa)

North Downs Way 100

Kettle Moraine 100 Endurance Runs

Flint Hills 50 and Marathon

NN Ultrabalaton

Autumn 100

Gravel Worlds Run Series (Lincoln)

The Wall

The Hawk Hundred (Lawrence)

Lean Horse Ultra Marathon

Run Woodstock

TARC Stone Cat Trail Festival

Norfolk Festival of Running (King's Lynn)

Connemara International Marathon (Connemarathon)

Race to the Stones

Running with the Devil (Las Vegas)

Gower Coastal Trail Races

Ring O' Fire

Race to the King

Reims Champagne Run

Cairngorms Ultra Trail

Ice Age Trail 50

Lake Tahoe Marathon

Holiday Lake 50K (Appomattox)

West Highland Way Race

HOKA Bandera Endurance Trail Race

Mohican Trail 100 Mile Run

Spokane River Run

South Downs Way 100

Minnesota Voyageur Trail Ultramarathon

Devil o' the Highlands Footrace

Bimbler's Bluff 50K

Maah Daah Hey Trail Run (Medora)

Chiltern Wonderland 50

Endurancelife Pembrokeshire

Montane Winter Spine Race

Sheltowee Trace Ultras (Big Turtle Trail Runs), Morehead

Tollymore Extreme (Tollymore Trail Marathon), Newcastle

More lowest gap factor ultramarathon route maps

How lowest gap factor ultramarathon route maps qualify

Methodology

Data coverage

Lowest GAP factor ultramarathon route map questions

What qualifies for lowest gap factor 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

Sinks Canyon Rough and Tumble Trail Races

Davos X-Trails

Hardrock Hundred Mile Endurance Run

Foot Levelers Blue Ridge Marathon

McKenzie River Trail Run 50K

Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet)

Stort30

Bath & Bristol Railway Races

Endurancelife Suffolk (Dunwich)

Thames Path 100

The Pistol Ultra (Alcoa)

North Downs Way 100

Kettle Moraine 100 Endurance Runs

Flint Hills 50 and Marathon

NN Ultrabalaton

Autumn 100

Gravel Worlds Run Series (Lincoln)

The Wall

The Hawk Hundred (Lawrence)

Lean Horse Ultra Marathon