Les 3 Vallées · France
Grandes Bosses
Blue (easy)
67
Excellent
2.1 km
Length
348 m
Vertical drop
2238 m
Starts at
1890 m
Ends at
16.6%
Avg gradient
38.8%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Grandes Bosses is a blue (easy) run at Les 3 Vallées measuring 2.1 km, dropping 348 m from 2238 m down to 1890 m. It averages a 16.6% gradient, steepening to around 38.8% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 67/100 — Excellent
Vertical12/30
Length10/25
Gradient character25/25
Flow20/20
Scored from the run's real geometry — steepness is judged against what a blue (easy) run should feel like, so every difficulty class can reach 100. Methodology
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