8c

8C is a designation used in several domains, most notably as a boulder problem grade in the Fontainebleau (Bleau) climbing grading system. In this context, 8C represents a very high level of difficulty and is applied to problems that demand extreme strength, precision, and problem-solving ability. The grade is part of the Bleau scale, which has historically tracked the progression of boulder problems in Fontainebleau and has since been adopted by climbers worldwide as a proxy for upper-end bouldering challenge.

The 8C grade is commonly considered to be at the upper end of the scale, and many climbers place it near the pinnacle of established Bleau ratings. Conversions between the Bleau grades and the more widely known V-scale are approximate and vary among sources and climbers. A rough correspondence places 8C at or above the level of V16, with some disagreement about precise equivalence. Ratings can change over time as problems are repeated, revised, or as grading conventions evolve.

Beyond climbing, 8C may appear as an alphanumeric code or model designation in other contexts, where its meaning depends entirely on the specific domain. In those cases, 8C is not related to the climbing grade.

In summary, 8C most commonly denotes a very demanding boulder problem within the Fontainebleau system, marking a high threshold of technical and physical challenge in modern bouldering. See also Fontainebleau grading, V-scale, bouldering.