Grouse Mountain · Canada
Purgatory
Double black (expert)Grooming: backcountry
55
Excellent
459 m
Length
244 m
Vertical drop
1191 m
Starts at
946 m
Ends at
51.5%
Avg gradient
66%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Purgatory is a double black (expert) run at Grouse Mountain measuring 459 m, dropping 244 m from 1191 m down to 946 m. It averages a 51.5% gradient, steepening to around 66% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 55/100 — Excellent
Vertical8/30
Length2/25
Gradient character25/25
Flow20/20
Scored from the run's real geometry — steepness is judged against what a double black (expert) run should feel like, so every difficulty class can reach 100. Methodology
Explore Purgatory on the map
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