About This Race
The 161K distance represents the ultimate test at Ultra-Trail Mount Yun, demanding runners navigate the complete mountain ecosystem across terrain that shifts from dense pine forests to exposed ridgelines and through the unique ice cave formations. This flagship distance requires seasoned ultra runners with extensive 100-mile experience, as the combination of technical terrain and significant elevation changes creates a formidable challenge that tests both physical endurance and mental resilience over what will likely be 20-30 hours of continuous effort. Runners choosing this distance commit to experiencing Mount Yun's full character, from the mystical early morning starts through multiple day-night cycles that reveal the mountain's changing moods and ancient presence.
Notable Features
The race takes place on Mount Yun, a location historically significant as a place once visited by Laozi, the founder of Taoism. Runners experience diverse terrain including pine forests, ice cave formations, and mountain peaks in what organizers describe as an emerald paradise of natural beauty combined with deep cultural heritage.