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For Strava climbs there is an objective categorization that is length in meters time grade in percent, with this categories: score = length(m) * grade(%) Cat 3: score > 16000 Cat 2: score > 32000 Cat 1: score > 64000 Cat HC: score > 80000 For example Alpe d'Huez has a length of 13800m and average gradient of 8.1% (according to Wikipedia), giving a ...



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