Background <p>As the global population of older adults continues to rapidly increase, there is a pressing need to address diverse concerns related to their physical, cognitive, and psychosocial well-being. In this scoping review, we aimed to map the existing literature on opportunities and challenges inherent in the implementation dynamics of scaling up a community-based health promotion and exercise programs designed for older adults. The research question is ‘What are the opportunities and challenges of successfully scaling up a community-based health promotion and exercise program for older adults?’</p> Methods <p>Three databases (EBSCO Host Medline, The Cochrane Library, and Scopus) were searched for articles published between January 2013 to December 2023. Utilizing a three-step screening process, 17 articles describing the opportunities and challenges of implementing a community-based health promotion and exercise program for older adults at scale were selected for inclusion in this scoping review. Opportunities and challenges were categorized through the lens of the RE-AIM (reach, evaluation, adoption, implementation, maintenance) framework.</p> Results <p>The multifaceted key opportunities and challenges identified on the implementation dynamics of scaling up a community-based health promotion and exercise program for older adults across the RE-AIM framework encompassed issues related to engagement, participation, recruitment, accessibility, awareness, inclusivity, evaluation, adherence, baseline predictors, complexity, motivation, responsiveness, partnership, planning, viability, adaptation, optimization, training, infrastructure, resources, stewardship, and retention.</p> Conclusions <p>Addressing these opportunities and challenges comprehensively is imperative to ensure the successful implementation and enduring sustainability of scaled-up programs of this nature.</p>