13 JUNMAP
McKenzie River Trail Run 50K
Oregon
Event weekend
- 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
Mapped route ranking
Lowest GAP factor ultramarathon route maps
67 mapped ultramarathon race pages ranked by gap. Only races with stored route geometry and the required route metric qualify.
Which mapped route leads?
McKenzie River Trail Run 50K currently leads this mapped-route ranking on gap (-1.5%).
67Qualifying routes67Elevation profiles100%Profile share-1.5%Top metric
Ranked mapped pages
Featured ultramarathon route maps
12 DECMAP
Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet)
Florida
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
UltramarathonMAP
Race to the King
South East
Race date needs a fresh check
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
Event weekend
- 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
05 JUNMAP
Sheltowee Trace Ultras (Big Turtle Trail Runs), Morehead
Kentucky
Event weekend
- 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
Event weekend
- 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
16 AUGMAP
Two Tunnels Railway Races
South West
Event weekend
- 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
5.6%GAP£65Entry
24 OCTMAP
Beachy Head Marathon
South East
Event weekend
- Map
- Profile
- Character
GPS trace: 823 pts / www.visiteastbourne.com
- Coastal
- Parkland
- Countryside
- Forest
- Ascent
- 1,308 m
- m/km
- 24.9 m/km
5.7%GAP
24 OCTMAP
Endurancelife Coastal Trail Series - North York Moors (Ravenscar)
Yorkshire
Event weekend
- Map
- Profile
- Cost
- Character
GPS trace: 1,068 pts / www.endurancelife.com
- Coastal
- Historic
- Parkland
- Countryside
- Ascent
- 1,310 m
- m/km
- 23.7 m/km
5.7%GAP£71Entry
27 JUNMAP
Western States Endurance Run
California
Event weekend
- Map
- Profile
- PB
- Character
GPS trace: 1,431 pts / www.wser.org
- Mountainous
- Mountain
- Riverside
- Historic
- Ascent
- 4,960 m
- m/km
- 30.8 m/km
5.7%GAP
17 OCTMAP
Tecumseh Trail Marathon (Tecumseh Trail Challenge), Nashville Indiana
Indiana
Event weekend
- Map
- Profile
- Character
GPS trace: 1,469 pts / www.dinoseries.com
- Countryside
- Forest
- Lakeside
- Riverside
- Ascent
- 1,196 m
- m/km
- 23.9 m/km
5.8%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.
- 49Highland Fling Race (Milngavie)GAP 6.1% | Milngavie, scotland | elevation profile
- 50Patapsco Valley 50KGAP 6.6% | Catonsville, maryland | elevation profile
- 51Arc of AttritionGAP 7.2% | Porthtowan, Cornwall, south-west | elevation profile
- 52Wild Duluth RacesGAP 8.0% | Duluth, minnesota | elevation profile
- 53Massanutten Mountain Trails 100 Mile RunGAP 8.1% | Fort Valley, virginia | elevation profile
- 54Endurancelife Classic Quarter (Cornwall Coastal Ultra)GAP 8.3% | Lizard, south-west | elevation profile
- 55Tahoe Rim Trail Endurance RunsGAP 8.4% | Carson City, nevada | elevation profile
- 56The Malvern Hills UltraGAP 8.5% | Abberley, west-midlands | elevation profile
- 57Chuckanut 50kGAP 8.6% | Bellingham, washington | elevation profile
- 58Silver State 50/50 (Reno)GAP 8.6% | Reno, nevada | elevation profile
- 59Leadville Trail 100 RunGAP 8.9% | Leadville, colorado | elevation profile
- 60Kia Fjällmaraton (Fjällmaratonveckan), ÅrefjällenGAP 9.8% | Årefjällen, sweden | elevation profile
- 61Worlds End UltramarathonGAP 10.4% | Forksville, pennsylvania | elevation profile
- 62Scout Mountain UltrasGAP 11.3% | Pocatello, idaho | elevation profile
- 63Tamalpa Headlands 50KGAP 11.6% | Muir Beach, california | elevation profile
- 64SciaccheTrail – Cinque Terre Ultra TrailGAP 15.5% | Riomaggiore / Monterosso al Mare, Cinque Terre, La Spezia, Liguria, italy | elevation profile
- 65Endurancelife Peak District (Castleton)GAP 16.2% | Castleton, east-midlands | elevation profile
- 66TransvulcaniaGAP 25.1% | Fuencaliente / Los Llanos de Aridane, La Palma, Canary Islands, spain | elevation profile
- 67Gornergrat Zermatt MarathonGAP 32.4% | Zermatt, switzerland | 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?
McKenzie River Trail Run 50K leads this route-map ranking with gap -1.5%.