Between 1930 and 1950, bouldering underwent the next important transformations: Shoes, Movement, and Ethics.
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At the center of this revolution stood Pierre Allain. More than just an exceptional climber, Allain was an innovator, craftsman, and visionary who fundamentally changed how climbers interacted with rock. Through the invention of the first modern climbing shoes, a new emphasis on precise movement, and a growing culture of problem-solving on boulders, he helped lay the foundations of modern bouldering.
This period also saw the emergence of iconic Fontainebleau problems such as Angle Allain and La Marie-Rose, climbs that demonstrated a new way of thinking about difficulty and movement. Together with climbers like René Ferlet, Allain helped establish many of the values that still define bouldering today.
Fontainebleau Becomes a Laboratory
By the early 1930s, the sandstone boulders of Fontainebleau had already attracted generations of climbers. The Bleausards—dedicated climbers traveling from Paris—used the forest as a training ground for alpine objectives. However, a growing number of climbers began to appreciate the boulders for their own challenges rather than merely as preparation for larger mountains.
Pierre Allain was among the most influential members of this movement. Rather than focusing solely on reaching summits, he became fascinated by movement itself: balance, body positioning, friction, and the puzzle-like nature of individual sequences.
Under his influence, Fontainebleau evolved into a true laboratory of movement, where climbers systematically experimented with technique and pursued increasingly intricate lines on relatively small features of rock. This marked a clear departure from earlier bouldering problems, which typically relied on more obvious holds, larger incut features, and a more direct, strength-oriented style of climbing. In contrast, problems such as La Marie Rose and Angle Allain exemplify the new paradigm: sequences built on smaller edges, sloping surfaces, and precise foot placements that demanded balance and refinement rather than brute force. The emphasis shifted decisively from height and exposure to the mastery of movement itself, a philosophical change that would become one of the defining characteristics of modern bouldering.
The Invention of the Shoes that made Movement possible
Perhaps Pierre Allain’s most significant contribution came not on the rock itself, but in his workshop.
Before the 1930s, climbers typically wore heavy leather mountaineering boots fitted with hobnails. These boots were adequate for alpine terrain but poorly suited to the delicate sandstone of Fontainebleau.
Recognizing this limitation, Allain designed a revolutionary shoe featuring a soft rubber sole. Known simply as the “PA” shoe, named after his initials, it provided dramatically improved grip and sensitivity. Climbers could now stand on tiny footholds and trust friction on smooth slabs in ways that had previously been impossible.
The impact was immediate. Problems that had once seemed impossible suddenly became realistic objectives. Difficult sequences relying on subtle foot placements became accessible, and entirely new styles of climbing emerged.
Virtually every modern climbing shoe can trace its ancestry back to Allain’s original design.
Angle Allain: Inventor of the Shoes that made Movement possible
The influence of Allain’s footwear and philosophy can be seen clearly in one of Fontainebleau’s most famous problems: Angle Allain.
First climbed during the 1930s, the elegant arête became a symbol of the new climbing style emerging in Fontainebleau. Rather than relying on strength, the climb demanded precise weight shifts, careful balance, and absolute confidence in foot placements. Climbers had to learn to trust friction and move with control rather than force.
Interestingly, the climb was originally considered significantly harder than it is today. As climbing shoe technology improved—beginning with Allain’s own rubber-soled designs—the perceived difficulty decreased. What once represented the cutting edge became a classic benchmark demonstrating the effectiveness of technical footwork.
Even today, Angle Allain remains one of the purest examples of the Fontainebleau style: movement guided by balance, precision, and efficiency.
The Ethics of the Bleausards
The revolution occurring in Fontainebleau was not only technical; it was ethical.
The Bleausards increasingly valued the purity of an ascent. Climbers sought to solve problems using only their bodies and the natural features of the rock. Artificial aids were rejected. The challenge lay in discovering the most elegant sequence and mastering it through persistence and technique.
This approach emphasized:
- Respect for the rock.
- Appreciation of difficult movement.
These principles became deeply embedded in Fontainebleau culture and continue to influence bouldering ethics worldwide. The idea that a climb should be valued for the quality of its movement rather than its height can be traced directly to this period.
René Ferlet and the Next Generation
As the 1940s progressed, a new generation began building upon the foundations established by Allain.
Among the most influential was René Ferlet, whose achievements would help define the next step in Fontainebleau’s evolution. Ferlet embraced the technical style pioneered by the Bleausards and pushed standards further through elegant and demanding climbs.
His most famous contribution came in 1946 with the first ascent of La Marie-Rose. Widely regarded as one of the most iconic problems in Fontainebleau history, La Marie-Rose represented a significant leap forward in difficulty and sophistication. The climb combined delicate balance, subtle footwork, and careful body positioning in a way that perfectly embodied the emerging Fontainebleau style.
La Marie-Rose: The First Great Benchmark
La Marie-Rose occupies a special place in climbing history.
First climbed by René Ferlet in 1946, it is often regarded as one of the earliest benchmark 6A problems in Fontainebleau. While modern climbers may find harder grades commonplace, La Marie-Rose represented the frontier of what was considered possible at the time.
What made the problem revolutionary was not merely its difficulty. Like Angle Allain before it, success depended on technique rather than brute force. Climbers needed precise foot placements, refined balance, and an understanding of body positioning. This was all possible thanks to Allains Shoes that made Movement possible.
The problem became a proving ground for generations of climbers and remains one of the most repeated and respected classics in Fontainebleau today.
A Sport of Its Own
Climbers were now seeking out difficult problems for their own sake. Specialized equipment existed. Benchmark grades were emerging. Climbers discussed movement, technique, and style as central aspects of the activity.
Pierre Allain’s influence could be seen everywhere:
- In the shoes climbers wore.
- In the emphasis on footwork and friction.
- In the pursuit of elegant movement.
- In the belief that a short climb could be as meaningful as a mountain route.
These developments established the foundations upon which modern bouldering would be built.