Adventure-based learning is used by behavioral health providers to connect clients to therapeutic activities outside traditional settings. These approaches often aim to build internal and external assets that support positive youth development. Here we evaluate the impact of an experiential learning curriculum on youth development and identify program characteristics that support development of positive assets. The evaluation included classroom field observations, a pre/post survey of developmental assets, semi-structured student interviews, and focus groups with school employees. Program staff were successful creating a supportive environment, but there was no significant difference in average student asset scores before and after each course. Students described the program as an opportunity to explore their own backyard while stepping outside their comfort zone through teamwork and leadership activities. Evaluation of individual programs can build a suite of best practices for adventure-based education. In particular, emphasis on "challenge by choice" and youth-led activities resonated with students.