Forearm fractures are very common injuries during growth. In recent years popular sport activities like inline-skating and skateboarding have gained increasing importance as cause of accident. Despite increasing injury rates there are only a few studies describing the correlation between the mechanism of accident and the resulting pattern of injury. The aim of the present study was therefore to analyse the epidemiology and aetiology of forearm fractures in immature patients. Additionally the outcome of treatment was evaluated by clinical parameters.Initially 263 patients could be included in this retrospective cohort study (median: 9.93; range 6-14 years). Beyond classifying patients according to epidemiological and aetiological parameters a clinical and functional follow-up using established scores was performed (DASH score, score by Schmittenbecher et al.). Based on our standard of treatment, stable fractures were treated conservatively, instable fractures surgically. 55 months (range: 12-100) after first attendance 212 patients were followed up personally. With regard to the epidemiology and the aetiology inline-skating was the most common cause of accident (21, 3 %). 82 % did not wear wrist guards while injured. A special pattern of fracture was found only for simple falls, which lead significantly more often to torus buckle and greenstick fractures (p = 0.008). According to the classification described by Schmittenbecher et al., 75 % of the patients were graded as "excellent". There was a significant better outcome for simple fractures compared to complete fractures (p = 0.029).However, the type of treatment (conservative vs. surgical) did not have an influence on the overall result.