Roc d'Enfer · France
Graydon bis
Red (intermediate)
40
Very good
454 m
Length
45 m
Vertical drop
1653 m
Starts at
1608 m
Ends at
9.5%
Avg gradient
22%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Graydon bis is a red (intermediate) run at Roc d'Enfer measuring 454 m, dropping 45 m from 1653 m down to 1608 m. It averages a 9.5% gradient, steepening to around 22% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Watch for an uphill section: 25 m of climb about 200 m in.
Bonvo Slope Score: 40/100 — Very good
Vertical2/30
Length2/25
Gradient character20/25
Flow16/20
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
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