- Flat grade share
- 100.0%
- Ascent
- 39 m
- Climb density
- 0.2 m/km
- Descent
- 40 m
- Net elevation
- -1 m
- Max absolute grade
- 1.7%
- Fee
- Unavailable
As of
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The flattest ultramarathons, ranked from trusted raw-elevation route profiles across 110 qualifying races.
Ranking current as ofDaytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet) leads this ranking on flat grade share (100.0%).
Compare Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet) vs North Downs Way 100
| # | Race | Flat grade share | Ascent | Climb density | Descent | Net elevation | Max absolute grade | Fee | As of |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet) - florida | 100.0% | 39 m | 0.2 m/km | 40 m | -1 m | 1.7% | Unavailable | |
| 2 | North Downs Way 100 Ultramarathon - south-east | 97.3% | 155 m | 0.9 m/km | 95 m | 59 m | 20.8% | £220 | |
| 3 | Bath & Bristol Railway Races Ultramarathon - south-west | 96.7% | 136 m | 2.7 m/km | 135 m | 1 m | 6.7% | £65 | |
| 4 | Wasatch Front 100 Mile Endurance Run Ultramarathon - utah | 96.5% | 1,256 m | 7.8 m/km | 0 m | 1,256 m | 58.7% | Unavailable | |
| 5 | Stort30 Ultramarathon - east-of-england | 95.8% | 99 m | 2.0 m/km | 98 m | 0 m | 7.1% | £55 | |
| 6 | Thames Path 100 Ultramarathon - south-east | 94.4% | 222 m | 1.4 m/km | 174 m | 48 m | 11.9% | £225 | |
| 7 | The Pistol Ultra (Alcoa) - tennessee | 86.2% | 696 m | 4.3 m/km | 696 m | -0 m | 12.1% | Unavailable | |
| 8 | Endurancelife Suffolk (Dunwich) Ultramarathon - east-of-england | 84.9% | 247 m | 4.7 m/km | 246 m | 0 m | 8.4% | £71 | |
| 9 | Kettle Moraine 100 Endurance Runs Ultramarathon - wisconsin | 78.6% | 1,034 m | 6.4 m/km | 1,034 m | -0 m | 16.3% | Unavailable | |
| 10 | NN Ultrabalaton Ultramarathon - hungary | 73.0% | 3,407 m | 8.2 m/km | 3,408 m | -1 m | 22.6% | Unavailable | |
| 11 | Autumn 100 Ultramarathon - south-east | 70.6% | 1,380 m | 8.6 m/km | 1,381 m | -1 m | 21.3% | £220 | |
| 12 | Flint Hills 50 and Marathon Ultramarathon - kansas | 68.1% | 655 m | 8.1 m/km | 656 m | -1 m | 9.6% | Unavailable | |
| 13 | The Wall Ultramarathon - north-east | 63.7% | 1,140 m | 10.2 m/km | 1,158 m | -18 m | 15.8% | £230 | |
| 14 | The Hawk Hundred (Lawrence) Ultramarathon - kansas | 60.6% | 1,527 m | 9.5 m/km | 1,518 m | 8 m | 15.2% | Unavailable | |
| 15 | Ring O' Fire Ultramarathon - wales | 60.3% | 2,480 m | 11.9 m/km | 2,479 m | 1 m | 39.1% | £255 | |
| 16 | Spokane River Run Ultramarathon - washington | 59.3% | 925 m | 18.5 m/km | 925 m | 0 m | 25.9% | Unavailable | |
| 17 | Connemara International Marathon (Connemarathon) Ultramarathon - ireland | 58.0% | 755 m | 11.9 m/km | 732 m | 23 m | 19.4% | Unavailable | |
| 18 | Race to the King Ultramarathon - south-east | 57.0% | 1,434 m | 13.9 m/km | 1,434 m | 0 m | 18.8% | £155 | |
| 19 | Run Woodstock Ultramarathon - michigan | 57.0% | 1,764 m | 11.0 m/km | 1,763 m | 1 m | 10.2% | Unavailable | |
| 20 | Foot Levelers Blue Ridge Marathon Ultramarathon - virginia | 57.0% | 2,551 m | 30.2 m/km | 2,225 m | 326 m | 144.6% | Unavailable | |
| 21 | Lean Horse Ultra Marathon - south-dakota | 56.8% | 1,791 m | 11.1 m/km | 1,781 m | 10 m | 26.2% | Unavailable | |
| 22 | TARC Stone Cat Trail Festival Ultramarathon - massachusetts | 56.7% | 1,094 m | 10.9 m/km | 1,095 m | -0 m | 17.4% | Unavailable | |
| 23 | Race to the Stones Ultramarathon - south-east | 55.7% | 1,260 m | 12.6 m/km | 1,228 m | 32 m | 19.4% | Unavailable | |
| 24 | Rocky Raccoon 100 (Huntsville) Ultramarathon - texas | 53.2% | 1,880 m | 11.7 m/km | 1,952 m | -72 m | 108.6% | Unavailable | |
| 25 | Davos X-Trails Ultramarathon - switzerland | 52.8% | 3,372 m | 49.3 m/km | 3,372 m | 0 m | 3370.1% | Unavailable | |
| 26 | Gower Coastal Trail Races Ultramarathon - wales | 52.0% | 1,087 m | 13.5 m/km | 1,088 m | -1 m | 23.7% | £85 | |
| 27 | McKenzie River Trail Run 50K Ultramarathon - oregon | 50.7% | 535 m | 10.7 m/km | 892 m | -357 m | 22.4% | Unavailable | |
| 28 | Reims Champagne Run Ultramarathon - france | 50.1% | 1,343 m | 15.4 m/km | 1,333 m | 9 m | 21.0% | Unavailable | |
| 29 | Holiday Lake 50K (Appomattox) Ultramarathon - virginia | 49.9% | 810 m | 16.2 m/km | 799 m | 11 m | 35.7% | Unavailable | |
| 30 | Ice Age Trail 50 Ultramarathon - wisconsin | 47.8% | 1,263 m | 15.7 m/km | 1,263 m | 0 m | 22.6% | Unavailable | |
| 31 | HOKA Bandera Endurance Trail Race Ultramarathon - texas | 47.7% | 1,711 m | 17.1 m/km | 1,734 m | -23 m | 29.3% | Unavailable | |
| 32 | Lake Tahoe Marathon Ultramarathon - nevada | 46.7% | 1,912 m | 16.5 m/km | 1,939 m | -27 m | 44.7% | Unavailable | |
| 33 | Cairngorms Ultra Trail - scotland | 46.5% | 948 m | 15.8 m/km | 949 m | -1 m | 25.0% | £67 | |
| 34 | Gravel Worlds Run Series (Lincoln) Ultramarathon - nebraska | 46.0% | 589 m | 11.8 m/km | 588 m | 1 m | 8.9% | Unavailable | |
| 35 | Minnesota Voyageur Trail Ultramarathon - minnesota | 45.8% | 1,484 m | 18.4 m/km | 1,484 m | -0 m | 36.5% | Unavailable | |
| 36 | West Highland Way Race Ultramarathon - scotland | 45.8% | 2,703 m | 17.7 m/km | 2,748 m | -46 m | 32.9% | £157 | |
| 37 | Norfolk Festival of Running (King's Lynn) Ultramarathon - east-of-england | 45.4% | 627 m | 12.5 m/km | 628 m | -1 m | 9.8% | £38 | |
| 38 | Javelina Jundred Ultramarathon - arizona | 45.3% | 3,626 m | 22.5 m/km | 4,131 m | -504 m | 688.1% | Unavailable | |
| 39 | Chuckanut 50k Ultramarathon - washington | 40.7% | 1,416 m | 28.3 m/km | 1,422 m | -5 m | 34.9% | Unavailable | |
| 40 | The Arctic Triple // Lofoten Ultra-Trail - norway | 39.8% | 5,472 m | 33.5 m/km | 5,477 m | -4 m | 70.9% | Unavailable | |
| 41 | Mohican Trail 100 Mile Run Ultramarathon - ohio | 39.6% | 2,890 m | 18.0 m/km | 2,883 m | 7 m | 30.8% | Unavailable | |
| 42 | Chiltern Wonderland 50 Ultramarathon - south-east | 38.8% | 1,699 m | 21.0 m/km | 1,694 m | 5 m | 39.0% | £115 | |
| 43 | Leadville Trail 100 Run Ultramarathon - colorado | 38.1% | 4,444 m | 27.7 m/km | 4,445 m | -0 m | 42.6% | Unavailable | |
| 44 | Bimbler's Bluff 50K Ultramarathon - connecticut | 37.9% | 1,092 m | 21.8 m/km | 1,092 m | -0 m | 39.4% | Unavailable | |
| 45 | Highland Fling Race (Milngavie) Ultramarathon - scotland | 37.2% | 1,939 m | 22.8 m/km | 1,758 m | 181 m | 29.5% | £125 | |
| 46 | Two Tunnels Railway Races Ultramarathon - south-west | 35.9% | 1,231 m | 24.6 m/km | 1,229 m | 2 m | 17.3% | £65 | |
| 47 | Endurancelife Classic Quarter (Cornwall Coastal Ultra) - south-west | 35.6% | 1,916 m | 27.1 m/km | 1,884 m | 31 m | 45.0% | Unavailable | |
| 48 | Arc of Attrition Ultramarathon - south-west | 35.4% | 4,116 m | 25.5 m/km | 4,038 m | 78 m | 43.9% | £239 | |
| 49 | Gornergrat Zermatt Marathon Ultramarathon - switzerland | 34.8% | 2,408 m | 52.8 m/km | 404 m | 2,004 m | 32.0% | Unavailable | |
| 50 | South Downs Way 100 Ultramarathon - south-east | 34.7% | 3,410 m | 21.2 m/km | 3,504 m | -94 m | 31.8% | £220 | |
| 51 | Montane Winter Spine Race Ultramarathon - north-east | 34.1% | 9,781 m | 22.7 m/km | 9,901 m | -120 m | 49.7% | Unavailable | |
| 52 | Tecumseh Trail Marathon (Tecumseh Trail Challenge), Nashville Indiana Ultramarathon - indiana | 32.8% | 1,196 m | 23.9 m/km | 1,195 m | 0 m | 24.5% | Unavailable | |
| 53 | Endurancelife Pembrokeshire Ultramarathon - wales | 32.6% | 1,270 m | 22.8 m/km | 1,269 m | 1 m | 29.0% | Unavailable | |
| 54 | Maah Daah Hey Trail Run (Medora) Ultramarathon - north-dakota | 31.8% | 2,080 m | 25.9 m/km | 2,085 m | -5 m | 27.7% | Unavailable | |
| 55 | Sheltowee Trace Ultras (Big Turtle Trail Runs), Morehead - kentucky | 30.8% | 1,187 m | 14.8 m/km | 1,182 m | 5 m | 23.2% | Unavailable | |
| 56 | Wicklow Way Race Ultramarathon - ireland | 30.4% | 3,885 m | 30.6 m/km | 3,920 m | -35 m | 99.4% | Unavailable | |
| 57 | Endurancelife Coastal Trail Series - North York Moors (Ravenscar) Ultramarathon - yorkshire | 30.1% | 1,310 m | 23.7 m/km | 1,310 m | 0 m | 28.3% | £71 | |
| 58 | Devil o' the Highlands Footrace Ultramarathon - scotland | 29.8% | 1,641 m | 23.8 m/km | 1,876 m | -235 m | 28.9% | £100 | |
| 59 | Ultra Trail Vipava Valley (UTVV), Ajdovščina - slovenia | 27.7% | 6,307 m | 38.7 m/km | 6,305 m | 2 m | 66.6% | Unavailable | |
| 60 | Ethias 15 km de Liège Métropole Ultramarathon - belgium | 27.5% | 1,260 m | 28.0 m/km | 1,465 m | -206 m | 56.7% | Unavailable | |
| 61 | Kia Fjällmaraton (Fjällmaratonveckan), Årefjällen Ultramarathon - sweden | 27.4% | 3,203 m | 32.0 m/km | 3,175 m | 29 m | 41.7% | Unavailable | |
| 62 | Patapsco Valley 50K Ultramarathon - maryland | 26.0% | 1,387 m | 27.7 m/km | 1,394 m | -6 m | 31.6% | Unavailable | |
| 63 | Wild Duluth Races Ultramarathon - minnesota | 25.7% | 2,801 m | 28.0 m/km | 2,801 m | -0 m | 35.8% | Unavailable | |
| 64 | Worlds End Ultramarathon - pennsylvania | 25.4% | 3,319 m | 33.2 m/km | 3,320 m | -1 m | 37.1% | Unavailable | |
| 65 | Beachy Head Marathon Ultramarathon - south-east | 25.3% | 1,308 m | 24.9 m/km | 1,305 m | 2 m | 31.2% | Unavailable | |
| 66 | Gorge Waterfalls 100K Ultramarathon - oregon | 25.3% | 3,481 m | 34.9 m/km | 3,481 m | -0 m | 45.5% | Unavailable | |
| 67 | The Malvern Hills Ultra - west-midlands | 24.3% | 2,391 m | 31.6 m/km | 2,391 m | 0 m | 36.3% | £95 | |
| 68 | Massanutten Mountain Trails 100 Mile Run Ultramarathon - virginia | 24.0% | 4,799 m | 29.6 m/km | 4,799 m | 0 m | 35.1% | Unavailable | |
| 69 | Volvic Volcanic Experience (VVX) Ultramarathon - france | 22.0% | 7,564 m | 33.8 m/km | 8,228 m | -664 m | 60.6% | Unavailable | |
| 70 | Sinks Canyon Rough and Tumble Trail Races Ultramarathon - wyoming | 22.0% | 4,282 m | 85.6 m/km | 4,276 m | 5 m | 4914.5% | Unavailable | |
| 71 | adidas Innsbruck Alpine Trailrun Festival Ultramarathon - austria | 21.9% | 3,838 m | 34.1 m/km | 3,838 m | -0 m | 57.8% | Unavailable | |
| 72 | Soča Outdoor Festival Ultramarathon - slovenia | 21.8% | 2,541 m | 46.8 m/km | 2,550 m | -9 m | 47.8% | Unavailable | |
| 73 | Tahoe 200 Endurance Run Ultramarathon - california | 21.7% | 13,097 m | 40.6 m/km | 13,099 m | -1 m | 2413.5% | Unavailable | |
| 74 | Tollymore Extreme (Tollymore Trail Marathon), Newcastle Ultramarathon - northern-ireland | 21.6% | 1,630 m | 25.9 m/km | 1,638 m | -8 m | 28.1% | Unavailable | |
| 75 | Salomon Ultra-Trail Hungary - hungary | 20.7% | 3,938 m | 35.2 m/km | 3,937 m | 0 m | 46.5% | Unavailable | |
| 76 | Sleeping Giant Trail Runs Ultramarathon - connecticut | 20.5% | 2,012 m | 40.2 m/km | 2,017 m | -5 m | 54.7% | Unavailable | |
| 77 | Cascade Crest 100 Ultramarathon - washington | 20.3% | 6,253 m | 38.9 m/km | 6,268 m | -15 m | 50.0% | Unavailable | |
| 78 | MIUT - Madeira Island Ultra-Trail - portugal | 19.9% | 6,789 m | 61.7 m/km | 6,800 m | -11 m | 77.0% | Unavailable | |
| 79 | Western States Endurance Run Ultramarathon - california | 19.8% | 4,960 m | 30.8 m/km | 6,466 m | -1,506 m | 39.2% | Unavailable | |
| 80 | Run Rabbit Run 50 & 100 Mile Race Ultramarathon - colorado | 19.6% | 11,159 m | 69.3 m/km | 11,151 m | 8 m | 4511.9% | Unavailable | |
| 81 | Endurancelife Peak District (Castleton) Ultramarathon - east-midlands | 19.3% | 2,126 m | 41.7 m/km | 2,127 m | -0 m | 42.6% | Unavailable | |
| 82 | ROUT Classic 100 Miles (Rodopi Ultra Trail) - greece | 18.8% | 6,952 m | 38.2 m/km | 6,951 m | 2 m | 57.4% | Unavailable | |
| 83 | FUGA Penyagolosa Trails (Castelló) Ultramarathon - spain | 18.3% | 5,183 m | 48.9 m/km | 3,971 m | 1,213 m | 61.9% | Unavailable | |
| 84 | Tahoe Rim Trail Endurance Runs Ultramarathon - nevada | 17.3% | 5,117 m | 31.2 m/km | 5,117 m | -0 m | 34.8% | Unavailable | |
| 85 | Dalmacija Ultra Trail - croatia | 16.9% | 4,619 m | 44.3 m/km | 4,900 m | -281 m | 68.7% | Unavailable | |
| 86 | Running with the Devil (Las Vegas) Ultramarathon - nevada | 16.9% | 839 m | 16.8 m/km | 839 m | 0 m | 21.6% | Unavailable | |
| 87 | Tamalpa Headlands 50K Ultramarathon - california | 16.8% | 1,966 m | 39.3 m/km | 1,967 m | -1 m | 43.2% | Unavailable | |
| 88 | The North Face Grossglockner Ultra-Trail - austria | 16.5% | 6,328 m | 57.5 m/km | 6,328 m | 1 m | 53.2% | Unavailable | |
| 89 | SciaccheTrail – Cinque Terre Ultra Trail - italy | 16.2% | 4,300 m | 42.4 m/km | 4,334 m | -34 m | 40.1% | Unavailable | |
| 90 | Manitou's Revenge Ultramarathon - new-york | 16.0% | 4,203 m | 49.3 m/km | 4,549 m | -346 m | 67.3% | Unavailable | |
| 91 | Ultra-Trail Snowdonia by UTMB - wales | 15.8% | 9,055 m | 55.6 m/km | 9,055 m | -0 m | 59.5% | £259 | |
| 92 | Tatra SkyMarathon (Zakopane) Ultramarathon - poland | 15.5% | 5,502 m | 45.8 m/km | 5,174 m | 328 m | 68.7% | Unavailable | |
| 93 | Silver State 50/50 (Reno) Ultramarathon - nevada | 15.2% | 2,716 m | 33.8 m/km | 2,717 m | -1 m | 36.7% | Unavailable | |
| 94 | Douro Ultra Trail (Peso da Régua) - portugal | 15.0% | 5,188 m | 51.9 m/km | 5,198 m | -10 m | 63.3% | Unavailable | |
| 95 | Ultra Trail Učka - croatia | 14.8% | 4,470 m | 53.5 m/km | 4,470 m | 0 m | 51.7% | Unavailable | |
| 96 | Dolomiti Extreme Trail Ultramarathon - italy | 14.7% | 6,214 m | 61.5 m/km | 6,213 m | 1 m | 91.9% | Unavailable | |
| 97 | Unicaja Ultra Sierra Nevada - spain | 14.6% | 5,322 m | 53.2 m/km | 3,876 m | 1,447 m | 377.7% | Unavailable | |
| 98 | Hardrock Hundred Mile Endurance Run Ultramarathon - colorado | 14.2% | 9,546 m | 59.3 m/km | 9,547 m | -1 m | 463.1% | Unavailable | |
| 99 | Stranda Fjord Trail Race Ultramarathon - norway | 13.9% | 6,555 m | 69.0 m/km | 6,553 m | 2 m | 73.3% | Unavailable | |
| 100 | Bieg Rzeźnika (Cisna) Ultramarathon - poland | 13.4% | 3,887 m | 48.6 m/km | 3,794 m | 92 m | 45.6% | Unavailable |
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Showing the top 100 of 110 qualifying races; use the distance catalogue for the full searchable list. Scores are out of 100 when present; route, elevation and cost figures are shown in their natural units.
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.
Daytona 100 Ultramarathon (Jacksonville Beach to Ponce Inlet) ranks first by flat grade share, from 110 qualifying races compared under our published methodology.