世界上最艰难的极限耐力赛事，2017XTRAIL阿勒泰世界探险越野赛，“陆地上的麦哲伦环球航行”。当全球各地户外探险爱好者纷纷前来征服此次赛程的同时，一个特别的群体也悄然来到现场 —— 志愿者。他们来自喧嚣尘世的各个领域、各个角落，每天流水作业般行进着生命的轨迹，但此刻他们遵循着内心的渴望，冲破温室的壁垒，带着真诚，聚集到这里，与参赛者们一同勇敢前行。 Adventure Racing World Series 2017 XTRAIL Altay Expedition is considered to be the toughest outdoor endurance race in the world ,which will be held in the mysterious Xinjiang region of China in the coming June.Meanwhile,a special part of the expedition known as VOLUNTEERS are moving along with all these international racers to Xinjiang from completely different backgrounds all over China.No salaries.No tolls. No complaints.They just follow their inner desires to make this race a better one and to see their original life from a different perspective simultaneously.This experience will be the most bravest adventure of all these volunteers.