Children and adolescents with cerebral palsy often receive botulinum toxin A (BoNT-A) to manage hypertonia. This qualitative study aimed to describe and categorize BoNT-A effects that parents observed using the WHO’s International Classification of Functioning, Disability and Health (ICF) framework. An interpretive description methodology was used; semi-structured interviews were conducted with 15 parents of nonambulatory young people with cerebral palsy (mean age 10.2 years, SD 3.9, 7 males) who received BoNT-A. Parents reported BoNT-A effects on each ICF category. Through interpretive description, an overall theme emerged: “finding the right path to do what is best.” Five subthemes included (1) Parents’ hopes, (2) Parents’ goals for their child, (3) Parents’ learning what works, (4) Parents’ reflections, and (5) Parents’ destination. This study provides insights into parents’ journeys of how they learned about BoNT-A effects in their child, which helped them to identify goals for future treatment.