The 2023 Climate Action Field School (CAFS) was a four-day, collaborative learning opportunity for high school students in grade 12 who were keen to learn more about climate change, climate action, and positive social change. The program was rooted in the head, heart, hands model of transformative education and consisted of diverse interactive workshops, discussions with community partners, and experiential learning opportunities. It took place in June 2023 and also served as a youth engagement dimension of the Lakehead University C2U Expo.  This report provides an overview of the development and design of the 2023 CAFS.