The Strava climb categorization is similar to how the UCI categorizes climbs but with some modifications. When a climb is categorized, for the Tour de France for example, there is a subjective component to the categorization. If a climb is at the end of the stage it could get a tougher category than if it was earlier in the stage. Strava's method is objective, so if a climb is a category 1 climb it will always be a category 1.
Determining Climb Categories
A segment can be categorized as a climb on Strava if it meets the following criteria:
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The average gradient is at least 3.0%
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The segment distance is at least 300 meters.
- The length of the climb (in meters) multiplied by the grade of the climb is greater than 8,000.
You will see that a segment is categorized by the number on both the segment page and at the list of segments on your activity page. The categories are broken down as follows:
- Cat 4 > 8000
- Cat 3 > 16000
- Cat 2 > 32000
- Cat 1 > 64000
- HC (Hors Categorie) > 80000
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