Beast Runners Taiwan 100K is a 100km ultra marathon in Nantou, Taiwan. Distance: 100km. Elevation: 5,000m D+. Difficulty: challenging (Challenge Rating 54/100). DNF rate: 20%. Time limit: 28h. Surface: trail. Established 2016.
Beast Runners Taiwan 100K
Nantou, Nantou County, Taiwan
"100km through Taiwan's Central Mountain Range. Bamboo forests and high-altitude grasslands."
A 100km mountain ultra through Taiwan's Central Mountain Range.
The Course
A mountain ultra through Taiwan's Central Mountain Range — an island with over 200 peaks above 3,000m, compressed into an area smaller than Switzerland. The route climbs through subtropical forest, bamboo groves, and into the alpine zone above 3,000m where Taiwan's highest peaks pierce the clouds. The terrain is steep, technical, and often wet — Taiwan receives abundant rainfall and the mountain trails are slippery with moss and exposed roots. Indigenous Atayal and Bunun communities inhabit the mountain areas the race traverses.
mountainous
loop
8
3,100m
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
Post-race gathering with awards, food, and shared stories. The ultra community spirit is strong at Beast Runners Taiwan 100K.
Race Day Weather
14°C
4° – 22°
70%
20%
Taiwanese autumn — cool at altitude, humid in valleys.
Stats & Records
2016
150
20:00:00
Entry
TWD 4000
March
weeks
Lore & Trivia
Taiwan Beast Runners operates in one of Asia's most underrated mountain landscapes — an island with over 200 peaks above 3,000m, dense subtropical forest, and indigenous Atayal and Bunun communities who have lived in these mountains for millennia. Taiwan's trail running scene is young and explosive, driven by a population that sees the island's mountain interior as both playground and cultural heritage.
- ▸ Taiwan's Central Mountain Range contains over 200 peaks above 3,000m.
- ▸ The course passes through dense bamboo forests and subtropical rainforest.
- ▸ Trail running has exploded in popularity in Taiwan.
- ▸ Established in 2016.
- ▸ Total elevation gain: 5000m.
Taiwan packs 200 peaks above 3,000m into an island smaller than Switzerland. Beast Runners exploits every one.
Notable Editions
Typhoon Season Racing
The 2023 edition navigated around a typhoon that grazed the island, with organisers modifying the course in real-time to avoid flood-prone valleys. Taiwan's mountain racing demands flexibility that calm-weather races never test.
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Frequently Asked Questions
How long is Beast Runners Taiwan 100K? +
Beast Runners Taiwan 100K is a 100km (100km) ultra marathon with 5,000m of elevation gain. The course is loop on trail terrain.
How hard is Beast Runners Taiwan 100K? +
Beast Runners Taiwan 100K is rated challenging with a Challenge Rating of 54/100 (Challenging). The DNF rate is 20%. Runners have 28 hours to finish.
What is the weather like at Beast Runners Taiwan 100K? +
Average temperature is 14°C (range 4°C to 22°C) with 70% humidity and a 20% chance of rain. Taiwanese autumn — cool at altitude, humid in valleys.
Are crew and pacers allowed at Beast Runners Taiwan 100K? +
No crew access is permitted. Pacers are not allowed. Mandatory gear is required.
What is the average finish time for Beast Runners Taiwan 100K? +
The average finish time is 20:00:00. About 150 runners finish each year. The DNF rate is 20%.
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