Brévent/Flégère (Chamonix) · France
Lachenal
Red (intermediate)Grooming: classic
60
Excellent
1.7 km
Length
653 m
Vertical drop
2396 m
Starts at
1744 m
Ends at
37.3%
Avg gradient
59.7%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Lachenal is a red (intermediate) run at Brévent/Flégère (Chamonix) measuring 1.7 km, dropping 653 m from 2396 m down to 1744 m. It averages a 37.3% gradient, steepening to around 59.7% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 60/100 — Excellent
Vertical22/30
Length9/25
Gradient character10/25
Flow20/20
Scored from the run's real geometry — steepness is judged against what a red (intermediate) run should feel like, so every difficulty class can reach 100. Methodology
Explore Lachenal on the map
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