Pierre Allain (7 January 1904 – 19 December 2000) was a French alpinist who began climbing in the 1920s. In the 1930s he was joined by several others at Fontainebleau, where his group of "'Bleausards" developed a love of bouldering that went beyond simple training for the Alps. The famous (V2 - V3), done in 1934, is a testament to their dedication and to the resulting elevation of standards. In Allain's 1949 book, Alpinisme et Competition, he expresses his appreciation of this simple and understated climbing specialty.