The purpose of this study was to utilise global-positioning system (GPS) technology to quantify the running demands of national under 18 field hockey players competing in a regional field hockey tournament. Ten male field hockey players (mean ± SD; age 17.2 ± 0.4 years; stature 178.1 ± 5.2 cm; body mass 78.8 ± 8.8 kg) playing in different positional groups as strikers, midfielders and defenders wore GPS units while competing in six matches over seven days at an under 18 national field hockey tournament. GPS enabled the measurement of total distance (TD), low-speed activity (LSA; 0 -14.9 km/hr), and high-speed running (HSR; ≥ 15 km/hr) distances in addition to distances over five velocity bands (≤ 5.9km.h-1; 6 – 10km.h-1; 10.1 – 14.9km.h-1; 15 – 24.6km.h-1; and ≥ 24.7km.h-1). Midfielders covered significantly higher TD and the highest LSA when compared to other positional groups. Strikers covered significantly higher HSR and the lowest LSA out of all positional groups. These results suggest that these playing positions are sufficiently different to warrant specialised position-specific conditioning training leading into a field hockey tournament. Therefore, training schedules, substitutions and intra-match recovery should be tailored by position, taking into account the needs of the individual players.