School-based outdoor learning is an experiential learning approach that involves the integration of the natural environment with the learning process. This study focused on investigating the effect of a school-based outdoor learning experience on mood among 83 sixth grade students. The researcher found a positive correlation between time spent outside and feeling energetic, and a negative correlation with feeling angry, confused, or tired and with total mood state after students participated in an outdoor learning experience. Additionally, the researcher found a statistically significant improvement in overall mood and in anxiety and confusion following the outdoor education experience. Furthermore, two students participated in interviews and the researcher identified three themes: (a) enhanced learning, (b) improved mood, and (c) nature connectedness. The researcher discusses implications for practice, including teachers collaborating with community and government organization and universities. Furthermore, the author presents considerations for future research to expand upon the current findings, including replication studies.