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Ultra-Trail Mount Yun by UTMB

Ultra-Trail Mount Yun by UTMB 100K (97K)

100K (97K)
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Distance100K (97K)
Date16 Oct 2026
StatusOpen
Difficulty4/5

About This Race

The Ultra-Trail Mount Yun 100K sits within China's UTMB World Series circuit, offering international-caliber trail running against the backdrop of Mount Yun's forested ridgelines and distinctive geological features. At 97 kilometers, this distance draws experienced ultra runners seeking a full mountain traverse without committing to the 100-mile format. The course threads through dense pine forests and transitions across varied terrain that includes technical sections through ice cave formations—a signature element of the Mount Yun range. Runners need solid navigation skills and the ability to adapt pacing across changing surfaces and conditions. The cutoff structure allows for a deliberate pace while maintaining the event's competitive standards. As part of the UTMB World Series, the race attracts an international field and follows the organizational standards established across the circuit. The October timing typically offers stable autumn conditions in this region of China, though mountain weather remains a factor in gear and planning decisions.

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.

Location

Practical Info

Weather

October in the Mount Yun region typically brings cool autumn temperatures with stable conditions, though mountain microclimates can shift rapidly. Runners should prepare for temperature variation between forested valleys and exposed ridge sections.

Accommodation

As a UTMB World Series event, the race organization provides lodging information and recommendations through the official event website. International runners should plan for language considerations and verify visa requirements well in advance.

Best For

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Other Distances at This Event

20K (22K)

1,500m gain

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.

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.

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.