The aim of this study was to explore stakeholder perceptions surrounding the key determinants of, and impact of impairment on, sports performance in para dressage. Semi-structured interviews with 30 para dressage stakeholders (athletes, classifiers, judges, coach) were conducted and analyzed inductively using the framework method. Themes relating to the equine and human athlete were associated with overall dressage performance and discussed within the context of impairment and horse-rider partnership.  The themes outlined in this study will inform the development of an evidence-based classification system through the establishment of standardized, sport-specific performance measures, which will be used to assess the relationship between impairment and activity limitation in para dressage.