Vietnam Mountain Marathon (VMM) is a unique trail running of 10km, 21km, 42km, 70km or 100km in a spectacular mountain region of north Vietnam. The small dirt roads and narrow trails will take you through the majestic mountains and valleys that are only used by locals. Each route will encompass challenging climbs, exhilarating descents and a true glimpse of local life through the rice fields and ethnic minority villages.