Flat grade share
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 78.6% Favoured
Ice Age Trail 50 Ultramarathon vs Kettle Moraine 100 Endurance Runs Ultramarathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofIce Age Trail 50 Ultramarathon or Kettle Moraine 100 Endurance Runs Ultramarathon — which comes out ahead?
Kettle Moraine 100 Endurance Runs Ultramarathon has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
Ice Age Trail 50 Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 2.9%
- flat grade share
- 47.8%
- lower ascent
- 1,263 m
- climbing density
- 15.7 m/km
- net elevation
- 0 m
- maximum grade
- 22.6%
Kettle Moraine 100 Endurance Runs Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.6% Favoured
- flat grade share
- 78.6% Favoured
- lower ascent
- 1,034 m
- climbing density
- 6.4 m/km
- net elevation
- -0 m
- maximum grade
- 16.3%
| Metric | Ice Age Trail 50 Ultramarathon | Kettle Moraine 100 Endurance Runs Ultramarathon |
|---|---|---|
| Flat grade share | 47.8% | 78.6% ✓ |
| GAP factor (% slower than flat) | 2.9% | 0.6% ✓ |
| Uphill share | 26.1% | 10.8% |
| Steep-up share | 9.2% | 1.2% |
| Downhill share | 26.1% | 10.6% |
| Total ascent (m) | 1,263 m | 1,034 m |
| Climbing density (m/km) | 15.7 m/km | 6.4 m/km |
| Longest climb length (m) | 720 m | 2,970 m |
| Longest climb gain (m) | 51 m | 56 m |
| Longest climb average grade | 7.0% | 1.9% |
| Total descent (m) | 1,263 m | 1,034 m |
| Net elevation (m) | 0 m | -0 m |
| Max absolute grade | 22.6% | 16.3% |
| Start elevation (m) | 294 m | 294 m |
| Finish elevation (m) | 295 m | 293 m |
| Scenic score | Unavailable | 89/100 |
| Conditions | Unavailable | 46/100 |
GAP factor (% slower than flat)
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 0.6% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Ice Age Trail 50 Ultramarathon
- 15.7 m/km
Longest climb length (m)
Longest climb gain (m)
Longest climb average grade
Total descent (m)
Net elevation (m)
Max absolute grade
Start elevation (m)
Finish elevation (m)
Scenic score
- Ice Age Trail 50 Ultramarathon
- Unavailable
Conditions
- Ice Age Trail 50 Ultramarathon
- Unavailable
Only metrics available for at least one side are shown. A ✓ marks the better value for each metric (higher-is-better aware). Scores are out of 100 when available. Ascent, climbing density, max absolute grade and median finish describe course or field context and are not marked as better or worse.
Race facts that change the decision
| Fact | Ice Age Trail 50 Ultramarathon | Kettle Moraine 100 Endurance Runs Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. | Exact race date not confirmed. Event weekend starts 2026-06-13 (legacy event-level date). |
| Location | Whitewater, Wisconsin | La Grange, Wisconsin |
| Actual distance | 80.5 km | 160.9 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Out And Back |
| Surface | Mostly single Track dirt, rocky and tree Rooted trail through pinewoods, hardwood forests and rolling prairie, with Ice Age Trail eskers and incessant hills. | Almost entirely trail except for a couple hundred feet of road crossings. |
| Elevation character | Rolling | Rolling |
| Terrain | Beach, Trail | Trail |
| Scenery | Desert, Countryside, Forest, Parkland, Lakeside | Forest, Countryside, Lakeside, Riverside |
| Atmosphere | Wilderness, Scenic Tour, Competitive | Wilderness, Scenic Tour, Nighttime |
| Technicality | Technical | Moderate |
| Total ascent | 1,263 m | 1,034 m |
| Climbing density | 15.7 m/km | 6.4 m/km |
| Total descent | 1,263 m | 1,034 m |
| Net elevation | 0 m | -0 m |
| Max absolute grade | 22.6% | 16.3% |
| Flat grade share | 47.8% | 78.6% |
| GAP factor | 2.9% | 0.6% |
| Cutoff | 12:00:00 | 30:00:00 |
| Entry model | Open | Ballot |
Schedule
- Ice Age Trail 50 Ultramarathon
Exact race date not confirmed.
- Kettle Moraine 100 Endurance Runs Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-06-13 (legacy event-level date).
Location
- Ice Age Trail 50 Ultramarathon
- Whitewater, Wisconsin
- Kettle Moraine 100 Endurance Runs Ultramarathon
- La Grange, Wisconsin
Actual distance
- Ice Age Trail 50 Ultramarathon
- 80.5 km
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 160.9 km
raceindex.org mapped route held
- Ice Age Trail 50 Ultramarathon
- Held
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Held
raceindex.org elevation profile held
- Ice Age Trail 50 Ultramarathon
- Held
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Held
Course type
- Ice Age Trail 50 Ultramarathon
- Out And Back
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Out And Back
Surface
- Ice Age Trail 50 Ultramarathon
- Mostly single Track dirt, rocky and tree Rooted trail through pinewoods, hardwood forests and rolling prairie, with Ice Age Trail eskers and incessant hills.
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Almost entirely trail except for a couple hundred feet of road crossings.
Elevation character
- Ice Age Trail 50 Ultramarathon
- Rolling
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Rolling
Terrain
- Ice Age Trail 50 Ultramarathon
- Beach, Trail
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Trail
Scenery
- Ice Age Trail 50 Ultramarathon
- Desert, Countryside, Forest, Parkland, Lakeside
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Forest, Countryside, Lakeside, Riverside
Atmosphere
- Ice Age Trail 50 Ultramarathon
- Wilderness, Scenic Tour, Competitive
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Wilderness, Scenic Tour, Nighttime
Technicality
- Ice Age Trail 50 Ultramarathon
- Technical
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Moderate
Total ascent
- Ice Age Trail 50 Ultramarathon
- 1,263 m
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 1,034 m
Climbing density
- Ice Age Trail 50 Ultramarathon
- 15.7 m/km
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 6.4 m/km
Total descent
- Ice Age Trail 50 Ultramarathon
- 1,263 m
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 1,034 m
Net elevation
- Ice Age Trail 50 Ultramarathon
- 0 m
- Kettle Moraine 100 Endurance Runs Ultramarathon
- -0 m
Max absolute grade
- Ice Age Trail 50 Ultramarathon
- 22.6%
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 16.3%
Flat grade share
- Ice Age Trail 50 Ultramarathon
- 47.8%
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 78.6%
GAP factor
- Ice Age Trail 50 Ultramarathon
- 2.9%
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 0.6%
Cutoff
- Ice Age Trail 50 Ultramarathon
- 12:00:00
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 30:00:00
Entry model
- Ice Age Trail 50 Ultramarathon
- Open
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Ballot
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.
Common questions
Which is flatter, Ice Age Trail 50 Ultramarathon or Kettle Moraine 100 Endurance Runs Ultramarathon?
Kettle Moraine 100 Endurance Runs Ultramarathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.