Vietnam Mountain Marathon in 2023, a running event organized in Sapa (Vietnam) from 22 / 24 September. During the 5 races were held event. Course 105k (⨦ 105 km / + 5 950 m) in class RMT6 with average terrain slope 6% (G6). Course 70k (⨦ 71.5 km / + 3 900 m) in class RMT5 with average terrain slope 5% (G5). Course 50k (⨦ 47.5 km / + 2 650 m) in class RMT4 with average terrain slope 6% (G6). Course 25k (⨦ 23 km / + 950 m) in class RMT2 with average terrain slope 4% (G4). Course 10k (⨦ 11 km / + 600 m) in class RMT1 with average terrain slope 6% (G6).