Designed to be of use to outdoor education centers, camp set-ups, or even public or private schools, this guide to the development of an "hebertisme" site presents the following: (1) definition ("an opportunity to discover one's own potential and limitations in moving about in the natural environment" using a network of natural and manmade obstacles placed in a forested area); (2) George Hebert and the development of a physical fitness training concept that incorporates natural exercises which are functional, useful, and global and performed in the open air); (3) the men who imported Hebert's ideas on physical fitness (Father Raoul Cloutier and Georges Gauvreau); (4) site selection (an accidental terrain of four to five acres including a flat plateau is ideal); (5) site development (an ideal site is one that is very inconspicuous, that has kept as much of the ground vegetation as possible and that has used natural material that blends with the natural environment); (6) the hebertisme design (includes a central plateau, an aerial course, and a ground course); (7) the apparatus (classified as walking and running; balancing; crawling and "on all fours"; lifting, carrying, and throwing; jumping; arm-supporting; suspension; climbing; and the thrillers); (8) material (rope, planks, etc.); (9) safety (emphasis on calculated risk-taking); (10) program and pedagogy (examples). (JC)