First developed and tested in 1989, the Adventure Model suggests that as adventure participants become more skilled and specialized, they experience predictable changes in several participation behaviors. While previous studies supported the model, they were carried out with college students having similar skill and motivational characteristics. In the present study, a more diverse sample of 132 participants in a summer adventure program were surveyed. Participants, aged 18-60, rated their skill level as beginner, intermediate, advanced, or expert, and took part in rock climbing or kayaking/canoeing activities. The survey covered participants' attitudes, preferences, and self-reported behaviors relevant to the adventure activities. Results confirmed the model's predicted relationships among selected variables. Specifically, frequency of participation, skill rating, course level, equipment needed, risk sought, year of experience, and outdoor environment sought presented the combination of variables that was most effective in distinguishing among participants of different skill levels. There were no gender differences. Implications for course design are discussed. (SV)