Background/objectives <p>Young adult (YA) cancer survivors, aged 18 to 39, face unique physical, emotional, and social challenges during critical developmental milestones. While nature-based engagement has potential as an intervention for these challenges, a research gap exists regarding the lived experiences of this population in nature-based engagement. The aim of this study was to describe YA cancer survivors’ experiences engaging with nature before and after a cancer diagnosis.</p> Methods <p>A qualitative study was conducted with 15 YA cancer survivors recruited via social media and survivor groups. Data were collected through individual, one-on-one semi-structured interviews via Zoom, audio-recorded and transcribed. Data were analyzed iteratively using a general inductive approach and managed in NVivo to identify emergent themes.</p> Results <p>Participants were predominantly female, white, and diagnosed with breast cancer (mean age at diagnosis = 30.5&#xa0;years). Identity, Reconstruction, and Healing emerged as the overarching central theme. Four main themes were as follows: (1) nature as a sanctuary for therapeutic and spiritual reflection, (2) transformation of the survivor’s relationship with nature, (3) the role of nature in reclaiming agency, and (4) barriers to being in nature during illness.</p> Conclusions <p>Findings support nature’s vital role as a restorative resource for emotional and physical recovery for YA cancer survivors. Results support further research into modalities of nature-based interventions that promote their social interaction and reduce barriers to engagement, including virtual reality-based nature interventions.</p> Implications for Cancer Survivors <p>Nature offers opportunity for YA cancer survivors to reconcile their pre- and post-diagnosis identities and help improve their well-being and quality of life.</p>