Hors catégorie (HC) is a French term used in stage bicycle races to designate a climb that is "beyond categorization". The term was originally used for those mountain roads where cars were not expected to be able to pass.

The HC climb is the most difficult type of climb in a race. It is more demanding than a Category 1 climb which in turn is more demanding than a Category 2 climb and so on. The easiest category is Category 4.

These five categories are defined by their steepness and length. In addition, their position on the route can play a role. For instance, a climb that would normally be a Category 1 climb can become a HC climb if it is the final climb of a stage.

The average HC climb in the Tour de France from 2012 to 2016 is 16.1 kilometers long and has a grade of 7.4%. There are around 7 HC climbs per Tour.