Flat grade share
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Marathon du Mont-Blanc, Chamonix vs Marathon du Mont-Blanc, Chamonix 23K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofMarathon du Mont-Blanc, Chamonix or Marathon du Mont-Blanc, Chamonix 23K — which comes out ahead?
Marathon du Mont-Blanc, Chamonix has the stronger available profile on scenery score.
Route comparison snapshot
Marathon du Mont-Blanc, Chamonix
- Mapped route
- Not held
- Elevation profile
- Not held
- course flatness
- Unavailable
- flat grade share
- Unavailable
- lower ascent
- Unavailable
- climbing density
- Unavailable
- net elevation
- Unavailable
- maximum grade
- Unavailable
Marathon du Mont-Blanc, Chamonix 23K
- Mapped route
- Held Favoured
- Elevation profile
- Held Favoured
- course flatness
- 40.3%
- flat grade share
- 15.0%
- lower ascent
- 1,641 m
- climbing density
- 71.3 m/km
- net elevation
- 1,007 m
- maximum grade
- 35.0%
| Metric | Marathon du Mont-Blanc, Chamonix | Marathon du Mont-Blanc, Chamonix 23K |
|---|---|---|
| Flat grade share | Unavailable | 15.0% |
| GAP factor (% slower than flat) | Unavailable | 40.3% |
| Uphill share | Unavailable | 60.1% |
| Steep-up share | Unavailable | 41.5% |
| Downhill share | Unavailable | 24.9% |
| Total ascent (m) | Unavailable | 1,641 m |
| Climbing density (m/km) | Unavailable | 71.3 m/km |
| Longest climb length (m) | Unavailable | 1,800 m |
| Longest climb gain (m) | Unavailable | 307 m |
| Longest climb average grade | Unavailable | 17.1% |
| Total descent (m) | Unavailable | 634 m |
| Net elevation (m) | Unavailable | 1,007 m |
| Max absolute grade | Unavailable | 35.0% |
| Start elevation (m) | Unavailable | 1,039 m |
| Finish elevation (m) | Unavailable | 2,046 m |
| Scenic score | 100/100 ✓ | 92/100 |
| Conditions | 67/100 | 67/100 |
GAP factor (% slower than flat)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Uphill share
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Steep-up share
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Downhill share
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Total ascent (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Climbing density (m/km)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 71.3 m/km
Longest climb length (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Longest climb gain (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Longest climb average grade
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Total descent (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Net elevation (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Max absolute grade
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Start elevation (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Finish elevation (m)
- Marathon du Mont-Blanc, Chamonix
- Unavailable
Scenic score
- Marathon du Mont-Blanc, Chamonix
- 100/100 Favoured
Conditions
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.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
Race facts that change the decision
| Fact | Marathon du Mont-Blanc, Chamonix | Marathon du Mont-Blanc, Chamonix 23K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-06-25 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-06-25 (legacy event-level date). |
| Location | Chamonix-Mont-Blanc, France | Chamonix-Mont-Blanc, France |
| Actual distance | 42 km | 23 km |
| raceindex.org mapped route held | Not held | Held |
| raceindex.org elevation profile held | Not held | Held |
| Course type | Point To Point | Unavailable |
| Surface | Mountain trail (semi Autonomous trail race with technical alpine terrain). | Unavailable |
| Elevation character | Mountainous | Unavailable |
| Terrain | Trail | Unavailable |
| Scenery | Mountain, Forest, Waterfront, Countryside, Lakeside | Waterfront, Mountain, Forest, Countryside, Lakeside |
| Atmosphere | Destination, Community, Wilderness | Destination, Community, Wilderness |
| Technicality | Technical | Unavailable |
| Total ascent | 2,730 m | 1,641 m |
| Climbing density | Unavailable | 71.3 m/km |
| Total descent | Unavailable | 634 m |
| Net elevation | Unavailable | 1,007 m |
| Max absolute grade | Unavailable | 35.0% |
| Flat grade share | Unavailable | 15.0% |
| GAP factor | Unavailable | 40.3% |
| Cutoff | 10:00:00 | 6:00:00 |
| Field cap | 2,300 | 2,000 |
| Entry model | Ballot | Ballot |
Schedule
- Marathon du Mont-Blanc, Chamonix
Exact race date not confirmed. Event weekend starts 2026-06-25 (legacy event-level date).
- Marathon du Mont-Blanc, Chamonix 23K
Exact race date not confirmed. Event weekend starts 2026-06-25 (legacy event-level date).
Location
- Marathon du Mont-Blanc, Chamonix
- Chamonix-Mont-Blanc, France
- Marathon du Mont-Blanc, Chamonix 23K
- Chamonix-Mont-Blanc, France
Actual distance
- Marathon du Mont-Blanc, Chamonix
- 42 km
- Marathon du Mont-Blanc, Chamonix 23K
- 23 km
raceindex.org mapped route held
- Marathon du Mont-Blanc, Chamonix
- Not held
- Marathon du Mont-Blanc, Chamonix 23K
- Held
raceindex.org elevation profile held
- Marathon du Mont-Blanc, Chamonix
- Not held
- Marathon du Mont-Blanc, Chamonix 23K
- Held
Course type
- Marathon du Mont-Blanc, Chamonix
- Point To Point
- Marathon du Mont-Blanc, Chamonix 23K
- Unavailable
Surface
- Marathon du Mont-Blanc, Chamonix
- Mountain trail (semi Autonomous trail race with technical alpine terrain).
- Marathon du Mont-Blanc, Chamonix 23K
- Unavailable
Elevation character
- Marathon du Mont-Blanc, Chamonix
- Mountainous
- Marathon du Mont-Blanc, Chamonix 23K
- Unavailable
Terrain
- Marathon du Mont-Blanc, Chamonix
- Trail
- Marathon du Mont-Blanc, Chamonix 23K
- Unavailable
Scenery
- Marathon du Mont-Blanc, Chamonix
- Mountain, Forest, Waterfront, Countryside, Lakeside
- Marathon du Mont-Blanc, Chamonix 23K
- Waterfront, Mountain, Forest, Countryside, Lakeside
Atmosphere
- Marathon du Mont-Blanc, Chamonix
- Destination, Community, Wilderness
- Marathon du Mont-Blanc, Chamonix 23K
- Destination, Community, Wilderness
Technicality
- Marathon du Mont-Blanc, Chamonix
- Technical
- Marathon du Mont-Blanc, Chamonix 23K
- Unavailable
Total ascent
- Marathon du Mont-Blanc, Chamonix
- 2,730 m
- Marathon du Mont-Blanc, Chamonix 23K
- 1,641 m
Climbing density
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 71.3 m/km
Total descent
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 634 m
Net elevation
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 1,007 m
Max absolute grade
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 35.0%
Flat grade share
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 15.0%
GAP factor
- Marathon du Mont-Blanc, Chamonix
- Unavailable
- Marathon du Mont-Blanc, Chamonix 23K
- 40.3%
Cutoff
- Marathon du Mont-Blanc, Chamonix
- 10:00:00
- Marathon du Mont-Blanc, Chamonix 23K
- 6:00:00
Field cap
- Marathon du Mont-Blanc, Chamonix
- 2,300
- Marathon du Mont-Blanc, Chamonix 23K
- 2,000
Entry model
- Marathon du Mont-Blanc, Chamonix
- Ballot
- Marathon du Mont-Blanc, Chamonix 23K
- Ballot
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.