The Green Prescription Active Families (GRxAF) programme is an intensive intervention that focuses on overweight/obese children and adolescents, and is family/whānau-based. GRxAF supports lifestyle changes through weekly sessions (nutrition advice and/or physical activity), and goal setting for the family/ whānau for up to 12 months. Outcomes are reported from an audit of the GRxAF programme in Taranaki, which reviewed participant files for each referred child from May 2007 to December 2009. Ethnic affiliations for the 109 participants during the audit period were Māori (39%), New Zealand European (NZE; 58%), Pacific (3%), and Other ethnicity (1%). Mean age at entry was 10 years. Mean duration of programme involvement was 5 months. Overall, 33/60 (55%) of the participants completing the programme during the audit period graduated, having made steps towards healthy lifestyle change. Notably, fewer Māori than NZE successfully graduated (40% vs 68%; p=0.04). In comparison with those who attended no sessions, attendance at any activity sessions was associated with a higher likelihood of graduating (OR 3.65; 95% CI, 1.24 to 10.8).