University educators are concerned with student leadership development in order to generate much-needed leaders in every aspect of society. This sequential mixed methods study found that students who participate in a university co-curricular outdoor education leadership training program, combined with the experience of leading a wilderness backpacking trip, had increased leadership self-efficacy. Empirical evidence was found to support leadership development, as well as the effectiveness and importance of university co-curricular outdoor education leadership training programs. This research is significant to educators for determining priorities in providing resources and designing effective co-curricular programs to create tomorrow's leaders. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]