Ultra-Trail Mount Yun by UTMB 20K (22K)

20K (22K)·1,500m gain

mountainforesttechnicaltrail

AI-generated image

Distance20K (22K)

Gain1,500m

Date16 Oct 2026

StatusOpen

Difficulty2/5

About This Race

The most accessible distance option while still delivering a genuine mountain trail experience. This 1 Running Stone route introduces runners to Mount Yun's natural beauty and cultural significance in a more manageable format.

Location

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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.

Other Distances at This Event

50K (48K)

The 48-kilometer route explores Mount Yun's trail network through terrain that shifts between forested sections, exposed ridgelines, and passages through areas of cultural significance. Specific elevation gain data is not currently available, though runners should expect considerable vertical given the mountain setting and ultra designation. The course design reflects UTMB's approach to creating routes that balance physical challenge with opportunities to experience the landscape. Aid station locations and cutoff times follow the organization's standards for runner safety and support.

70K (68K)

The route traverses Mount Yun's mixed terrain, moving between established trails, forest paths, and technical sections that characterize the region's topography. Runners should expect a course that tests both technical skills and endurance management, though specific elevation profiles vary by year as the organizing team refines the route. As with all UTMB World Series events, the course will be marked to international standards with aid stations positioned at strategic intervals. The mixed terrain classification indicates runners will encounter variety throughout the distance, from runnable sections to more technical passages requiring careful footing.

100K (97K)

The 97-kilometer route covers the full range of Mount Yun's terrain features, from protected forest sections to exposed ridgeline passages. The course includes technical segments through ice cave areas that require careful footing and headlamp management during low-light hours. Specific elevation data has not been published, but the terrain mix indicates sustained climbing and descent across the mountain range.

100 miles (161K)

The 161K route provides a complete tour of Mount Yun's topography, transitioning between forested singletrack, rocky ridgeline traverses, and sections through the mountain's ice cave systems. Terrain varies from soft forest floor to technical rock gardens requiring careful foot placement. The mixed surface demands versatile footwear choices and adaptability as conditions shift throughout the route.