This study investigates the initial development of groupwork skills through outdoor adventure education (OAE) and the factors that predict the extent of this development, using the first two levels of Kirkpatrick's model of training evaluation. University students (N = 238) completed questionnaires measuring their initial reactions to OAE (Level 1 of the Kirkpatrick model) and learning from pre- to post-course (Level 2). There were high levels of enjoyment and satisfaction with OAE, and significant self-reported improvements in the use of groupwork skills, attitudes toward groupwork, and groupwork self-efficacy. Learning and intention to transfer learning to the university setting were both positively predicted by students' perceived use of groupwork skills before OAE, course satisfaction, enjoyment, groupwork self-efficacy, and attitude toward groupwork. These findings demonstrate that OAE increases students' use of interpersonal groupwork skills, and that this is predicted by positive beliefs at baseline and favorable reactions to the learning experience.