Le Grand Massif · France
Onyx
Black (advanced)Grooming: backcountry
77
Outstanding
1.8 km
Length
690 m
Vertical drop
2373 m
Starts at
1683 m
Ends at
38.3%
Avg gradient
85.1%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Onyx is a black (advanced) run at Le Grand Massif measuring 1.8 km, dropping 690 m from 2373 m down to 1683 m. It averages a 38.3% gradient, steepening to around 85.1% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 77/100 — Outstanding
Vertical23/30
Length9/25
Gradient character25/25
Flow20/20
Scored from the run's real geometry — steepness is judged against what a black (advanced) run should feel like, so every difficulty class can reach 100. Methodology
Explore Onyx on the map
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