Effects of B-Active2 (Enjoy Being Physically Active by Walking Safely: A Leisure Education Program) on the risk of falls, stress, and well-being of a sample of 44 adults with ASD (ages M = 36.88; SD =7.31) were examined using a controlled experimental trial. Given the relationship between physical activity and stress reduction to individual well-being, B-Active2 was developed as a multidimensional program involving leisure education and walking designed to create an enjoyable context in which adults with ASD learn about and engage in physical activity. All participants were evaluated on balance, gait, well-being, and stress at baseline and at 1 month postintervention by a team of therapists blind to study objectives. There was a significant difference postintervention on balance, F(1, 40) = 55.63, p < .001, η2 = .58; gait, F(1, 40) = 23.58, p < .001, η 2 =.37; and well-being, F(1, 40) = 34.16, p < .001, η 2 = .47). No statistically significant effect was found for level of stress reduction, F(1, 40) = 0.27, n.s. Results of this study support the conclusion that B-Active2 is a viable leisure education program that promotes physical activity of adults with ASD and has positive effects on their well-being and risk of falls.