GAP factor 40.3% slower than flat · net elevation 1,007 m
Decision summary
Lower than 15% of comparable mapped races
6:00:00 total cut-off
Historical race-date favourability, not a forecast
Verified GPS route
Quick answers
RaceIndex has a GPS course file for Marathon du Mont-Blanc, Chamonix 23K, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.
The Marathon du Mont-Blanc, Chamonix 23K route has 1,641 m of ascent, 634 m of descent and an estimated 40.3% grade-adjusted pace penalty versus a flat route.
The setting includes waterfront and mountain.
Its normalised GAP factor is 40.3% slower than a flat course, with about 1641 m of total ascent.