Background: Research highlights how high school near-peer mentors (HSNPMs) in outdoor school settings enhance younger students' programing experiences. Through this engagement, HSNPMs' critical consciousness (CC) of equity in outdoor and experiential education (OEEE) expands. Purpose: This article explores how HSNPMs develop CC of environmental and social justice in OEEE. Methodology/Approach: We used critical ethnography to understand how near-peer mentoring programing associated with equity, diversity, access, and inclusion (EDAI) develop CC, in OEEE. Findings/Conclusion: Intentionally developed training and curricula rooted in social justice education facilitate CC development. This training includes staff's facilitation of equity discussions and support of high school students' EDAI-related awareness, skills, and behaviors. Implications/Recommendations: HSNPMs contribute to EDAI in OEEE programs. We recommend including HSNPMs in staff training, program improvements, and planning activities.