Classifications intended as an objective measure of the technical difficulty of a climbing route (including rock, ice, bouldering, mixed, and aid).
The technical difficulty grading system for aid climbing (both for "original" and an adapted version...
Part of the alpine climbing system for grading the technical difficulty of alpine climbing routes, w...
A grading system for bouldering invented by John Gill, now superseded by the V-grading system.
The technical difficulty grading system for aid climbing that is "clean" (i.e. no hammered pitons or...
See grade.