What is the UIAA rock climbing grading scale and how should it be read today?
UIAA Grades of Difficulty in Rock Climbing
UIAA Grade | General Indication |
I | Very easy climbing on rock steps and simple terrain. Handholds are large and obvious, and movement is straightforward. |
II | Easy climbing with more frequent use of the hands. Here real climbing begins; holds and supports are still abundant. |
III | Moderate climbing requiring basic climbing technique. Movements are more continuous and secure route reading becomes more important. |
IV | Distinctly more sustained climbing, with steeper sections and clearer technical demands. Good climbing technique is required on features such as chimneys, cracks and corners, together with some specific training. |
V | Technical climbing in which handholds and footholds are generally smaller or less obvious. Efficient movement, balance and route reading become increasingly important. |
VI | Sustained and demanding free climbing. Small holds and a particular combination of well-studied movements are often required; overhanging sections may demand special training and considerable arm and hand strength. |
VII | Advanced climbing with clearly difficult moves and more sustained technical sequences. Climbers can expect greater physical effort and a higher technical level throughout the route. |
VIII | Advanced climbing with clearly difficult moves and more sustained technical sequences. Holds may be very small and widely spaced, requiring sophisticated training, especially finger strength, balance and grip technique. |
IX | Very difficult climbing at a very high level, often involving demanding sequences, powerful moves or highly technical climbing. |
X | Extremely difficult climbing with exceptional technical and physical demands. Routes at this grade usually require outstanding strength, refined technique and the ability to link very hard sequences. |
XI | Elite climbing at an exceptional level of difficulty. The technical and physical demands are extremely high, and success generally depends on highly specialised preparation and performance. |
XII | Among the highest levels currently represented within the UIAA scale. Climbing at this grade corresponds to the very forefront of modern difficulty and should be understood as part of an open scale that may continue to evolve. |
How the UIAA
scale works
The UIAA rock-climbing scale expresses increasing difficulty in Roman numerals. Plus and minus signs may be used to indicate intermediate levels. As with all climbing grades, the scale provides guidance rather than absolute precision.
Important note on
interpretation
Climbing grades are an aid to interpretation, not an exact science. They help climbers estimate the likely difficulty of a route, but they do not describe every aspect of an ascent. Route length, style, continuity, rock type, protection, exposure and conditions may all influence how difficult a climb feels in practice.
Comparisons between grading systems should therefore be treated as indicative rather than exact. Different systems emerged in different climbing traditions and do not always describe the same kind of difficulty. A grade should always be read in its full context.
