This study examined trust development between participants of outdoor education programs and outdoor leaders. Participants were college students enrolled in outdoor education courses. Using a factorial survey design, the technical ability, interpersonal ability, benevolence, integrity, and gender of an outdoor leader was displayed randomly in a series of scenarios. Along with these leader attributes, the scenarios included two hypothetical situations that occur in outdoor education settings. Participants also completed a measure of dispositional optimism. Data were analyzed using hierarchical linear modeling, which revealed that displays of a leader's technical ability, interpersonal ability, benevolence, and integrity each influenced trust scores positively. Implications for future research and for outdoor leadership practice are discussed. (Contains 2 figures, 1 table, and 1 footnote.)