Design thinking is often proposed as an educative strategy to enhance growth mindset, problem solving, and creativity, but there are very few evaluations of the impact of experiential design thinking programs. The primary aim of this study was to investigate whether an online design-thinking workshop provided to outdoor education staff could improve their design-thinking traits. The pilot program was delivered over a 6-week period and comprised four, 2-hour sessions, in which teams worked together to actively engage in the steps of the design thinking process. Significant improvements were observed in participants' growth mindset and design thinking process--specifically, feedback seeking. Furthermore, design thinking was strongly correlated with growth mindset and cognitive flexibility; two constructs previously theorised to be associated with design thinking. This study provides a framework for constructing online design thinking workshops and how to effectively evaluate participant outcomes.