This study investigated the impact of a 15-week outdoor experiential program on the moral reasoning of college students. One hundred and ninety-six university students volunteered to participate in this study, which utilized Rest's (1979) Defining Issues Test (DIT). The DIT investigates how individuals arrive at making decisions, and formulates a “P” (Principled moral reasoning) score for each subject. The groups were found to be homogeneous in moral reasoning at the pretest (outdoor experiential x = 36.07; control x = 33.08; F = 0.05). There was a statistically significant difference on the posttest scores of the outdoor experiential program participants (x = 40.98) in relation to the control group (x = 34.14) (F = 3.84). The results of this study demonstrated that the outdoor experiential program participants were significantly different from the control group at posttest. It is postulated that even though improved moral reasoning was not a stated objective, the outdoor experiential students, through front-loading, reflection, critical thinking, problem solving, and adherence to the full value contract, did enhance their level of moral reasoning. Through the combined modeling of behavior and discussion, changes in behavior can occur. The nature of outdoor experiential programs seems well suited to positively influence moral and ethical reasoning.