Flat grade share
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 78.6% Favoured
Kettle Moraine 100 Endurance Runs Ultramarathon vs Ice Age Trail 50 Ultramarathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofKettle Moraine 100 Endurance Runs Ultramarathon or Ice Age Trail 50 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
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%
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%
| Metric | Kettle Moraine 100 Endurance Runs Ultramarathon | Ice Age Trail 50 Ultramarathon |
|---|---|---|
| Flat grade share | 78.6% ✓ | 47.8% |
| GAP factor (% slower than flat) | 0.6% ✓ | 2.9% |
| Uphill share | 10.8% | 26.1% |
| Steep-up share | 1.2% | 9.2% |
| Downhill share | 10.6% | 26.1% |
| Total ascent (m) | 1,034 m | 1,263 m |
| Climbing density (m/km) | 6.4 m/km | 15.7 m/km |
| Longest climb length (m) | 2,970 m | 720 m |
| Longest climb gain (m) | 56 m | 51 m |
| Longest climb average grade | 1.9% | 7.0% |
| Total descent (m) | 1,034 m | 1,263 m |
| Net elevation (m) | -0 m | 0 m |
| Max absolute grade | 16.3% | 22.6% |
| Start elevation (m) | 294 m | 294 m |
| Finish elevation (m) | 293 m | 295 m |
| Scenic score | 89/100 | Unavailable |
| Conditions | 46/100 | Unavailable |
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 | Kettle Moraine 100 Endurance Runs Ultramarathon | Ice Age Trail 50 Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-06-13 (legacy event-level date). | Exact race date not confirmed. |
| Location | La Grange, Wisconsin | Whitewater, Wisconsin |
| Actual distance | 160.9 km | 80.5 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Out And Back |
| Surface | Almost entirely trail except for a couple hundred feet of road crossings. | Mostly single Track dirt, rocky and tree Rooted trail through pinewoods, hardwood forests and rolling prairie, with Ice Age Trail eskers and incessant hills. |
| Elevation character | Rolling | Rolling |
| Terrain | Trail | Beach, Trail |
| Scenery | Forest, Countryside, Lakeside, Riverside | Desert, Countryside, Forest, Parkland, Lakeside |
| Atmosphere | Wilderness, Scenic Tour, Nighttime | Wilderness, Scenic Tour, Competitive |
| Technicality | Moderate | Technical |
| Total ascent | 1,034 m | 1,263 m |
| Climbing density | 6.4 m/km | 15.7 m/km |
| Total descent | 1,034 m | 1,263 m |
| Net elevation | -0 m | 0 m |
| Max absolute grade | 16.3% | 22.6% |
| Flat grade share | 78.6% | 47.8% |
| GAP factor | 0.6% | 2.9% |
| Cutoff | 30:00:00 | 12:00:00 |
| Entry model | Ballot | Open |
Schedule
- Kettle Moraine 100 Endurance Runs Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-06-13 (legacy event-level date).
- Ice Age Trail 50 Ultramarathon
Exact race date not confirmed.
Location
- Kettle Moraine 100 Endurance Runs Ultramarathon
- La Grange, Wisconsin
- Ice Age Trail 50 Ultramarathon
- Whitewater, Wisconsin
Actual distance
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 160.9 km
- Ice Age Trail 50 Ultramarathon
- 80.5 km
raceindex.org mapped route held
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Held
- Ice Age Trail 50 Ultramarathon
- Held
raceindex.org elevation profile held
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Held
- Ice Age Trail 50 Ultramarathon
- Held
Course type
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Out And Back
- Ice Age Trail 50 Ultramarathon
- Out And Back
Surface
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Almost entirely trail except for a couple hundred feet of road crossings.
- 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.
Elevation character
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Rolling
- Ice Age Trail 50 Ultramarathon
- Rolling
Terrain
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Trail
- Ice Age Trail 50 Ultramarathon
- Beach, Trail
Scenery
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Forest, Countryside, Lakeside, Riverside
- Ice Age Trail 50 Ultramarathon
- Desert, Countryside, Forest, Parkland, Lakeside
Atmosphere
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Wilderness, Scenic Tour, Nighttime
- Ice Age Trail 50 Ultramarathon
- Wilderness, Scenic Tour, Competitive
Technicality
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Moderate
- Ice Age Trail 50 Ultramarathon
- Technical
Total ascent
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 1,034 m
- Ice Age Trail 50 Ultramarathon
- 1,263 m
Climbing density
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 6.4 m/km
- Ice Age Trail 50 Ultramarathon
- 15.7 m/km
Total descent
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 1,034 m
- Ice Age Trail 50 Ultramarathon
- 1,263 m
Net elevation
- Kettle Moraine 100 Endurance Runs Ultramarathon
- -0 m
- Ice Age Trail 50 Ultramarathon
- 0 m
Max absolute grade
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 16.3%
- Ice Age Trail 50 Ultramarathon
- 22.6%
Flat grade share
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 78.6%
- Ice Age Trail 50 Ultramarathon
- 47.8%
GAP factor
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 0.6%
- Ice Age Trail 50 Ultramarathon
- 2.9%
Cutoff
- Kettle Moraine 100 Endurance Runs Ultramarathon
- 30:00:00
- Ice Age Trail 50 Ultramarathon
- 12:00:00
Entry model
- Kettle Moraine 100 Endurance Runs Ultramarathon
- Ballot
- Ice Age Trail 50 Ultramarathon
- Open
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, Kettle Moraine 100 Endurance Runs Ultramarathon or Ice Age Trail 50 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.