Timberline Mountain · United States
Upper Thunder Draft
Double black (expert)Grooming: backcountry
54
Very good
616 m
Length
184 m
Vertical drop
1284 m
Starts at
1100 m
Ends at
29.5%
Avg gradient
36.6%
Max gradient
sustained 50 m
Elevation profile
Run analysis
Upper Thunder Draft is a double black (expert) run at Timberline Mountain measuring 616 m, dropping 184 m from 1284 m down to 1100 m. It averages a 29.5% gradient, steepening to around 36.6% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 54/100 — Very good
Vertical6/30
Length3/25
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 Upper Thunder Draft on the map
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