The Fontainebleau Bouldering Scale
The Fontainebleau scale, universally shortened to "Font," is the European standard for grading boulder problems, and it carries the name of the sandstone forest south of Paris where modern bouldering was born. Generations of Parisian climbers, the bleausards, refined their craft on these rounded sandstone blocks, and the grading system grew with them. Today Font grades appear on bouldering circuits across Europe and beyond. Understanding the scale lets you read European boulder guides and pace your progress on real rock. Explore the world's bouldering forests on the map.
The Birthplace of Bouldering
Fontainebleau, about an hour south of Paris, is a vast forest scattered with thousands of sandstone boulders. From the late nineteenth century it served as training ground for alpinists, and through the twentieth century it became the cradle of bouldering as a discipline in its own right. The bleausards developed the colour-coded circuits — linked sequences of problems of similar difficulty — that remain a defining feature of the area. It is fitting that the world's most widely used bouldering scale bears its name.
How the Scale Works
The Font scale mirrors the French route-grading structure but is read differently in bouldering. It uses a number, then a capital letter A, B, or C, refined by a + sign: 5, 6A, 6A+, 6B, 6B+, 6C, 6C+, 7A, 7A+, and onward. The crucial point is that boulder grades use capital letters and are calibrated separately from route grades — a Font 6A boulder is harder than a 6a route, because the difficulty is concentrated into a few powerful moves rather than spread over a long pitch.
Where the Grades Land
Beginners typically start around Font 3 to 5; the popular yellow and orange circuits at Fontainebleau cover this range. Climbing 6A to 6C marks solid intermediate progress, and the famous blue and red circuits live here. Font 7A is a milestone for committed boulderers, 7C represents advanced ability, and 8A and above belongs to the strong and dedicated. The very hardest problems in the forest and worldwide push into 8C and 9A, the realm of elite specialists.
The Colour Circuits
A distinctive Fontainebleau tradition is the circuit: a numbered sequence of problems sharing a colour painted at their base, designed to be climbed in order as a continuous session. Yellow and orange circuits suit beginners, blue and red are intermediate, and black and white are expert. Circuits teach movement, build endurance over many problems, and let climbers experience the forest's flow rather than fixating on a single hard line. They are a wonderful way to learn the subtle, friction-dependent style of the sandstone.
Font's Reputation for Subtlety
Font grades have a reputation for rewarding technique, balance, and delicate footwork over raw power. The rounded sandstone of Fontainebleau offers slopers, subtle smears, and committing mantles rather than positive jugs, and the grading reflects this. Many visiting climbers find their first sessions humbling, struggling on grades well below their usual level until they adapt to the friction-dependent, technical style. This is why Font is often described as feeling "harder" than the V-scale at equivalent numbers.
Comparing Font to the V-Scale
Rough equivalences help travellers: Font 6A is near V3, 6B near V4, 6C+ near V5, 7A near V6, 7A+ near V7, 7C+ near V10, and 8B near V13. The conversions are approximate and endlessly debated, and the difference in style — Font's technical subtlety versus the V-scale's powerful gym heritage — means the same climber can perform very differently in the two systems. As always, treat the first days in a new area as calibration.
Explore on the map
The Font scale was born in the forests of France and now grades boulders across Europe. Use the interactive map to find Fontainebleau and the great sandstone bouldering areas where the scale and the sport itself took shape.