Race Explorer

Kosci100

Ultra-Trail Kosciuszko

New South Wales, Australia · 28 Nov 2025 · 107.3 km · 3677 m ↑
UTMB World Series Trail 100K XL
max altitude 2220 m avg altitude 1618 m min altitude 1115 m

KosciMiler

Ultra-Trail Kosciuszko

New South Wales, Australia · 28 Nov 2025 · 162.4 km · 6029 m ↑
UTMB World Series Trail 100M XXL
max altitude 2219 m avg altitude 1513 m min altitude 891 m

INTHANON 50

Chiangmai Thailand

Chiang Mai Province, Thailand · 30 Nov 2025 · 39.5 km · 2273 m ↑
UTMB World Series Trail L
max altitude 1860 m avg altitude 1423 m min altitude 995 m

INTHANON 20

Chiangmai Thailand

Chiang Mai Province, Thailand · 30 Nov 2025 · 20.4 km · 1004 m ↑
UTMB World Series Trail Half Marathon M
max altitude 1457 m avg altitude 1194 m min altitude 995 m

MARATHON DESERT 42KM

TRAIL AGAFAY

Agafay, Cercle de Loudaya, Morocco · 30 Nov 2025 · 41.2 km · 779 m ↑
Trail Marathon L
max altitude 722 m avg altitude 615 m min altitude 552 m

ELEPHANT 100

Chiangmai Thailand

Mae Taeng, Chiang Mai Province, Thailand · 5 Dec 2025 · 90.2 km · 4822 m ↑
UTMB World Series Trail 100K XL
max altitude 1671 m avg altitude 923 m min altitude 318 m

CHIANG DAO 160

Chiangmai Thailand

Mae Na, Chiang Dao, Thailand · 5 Dec 2025 · 162.4 km · 8877 m ↑
UTMB World Series Trail 100M XXL
max altitude 1724 m avg altitude 916 m min altitude 318 m

Winter on the Downs 100 miles

Winter on the Downs 55/100 miles

Wealden, East Sussex, United Kingdom · 5 Dec 2025 · 161.7 km · 3875 m ↑
Trail 100M XXL
max altitude 242 m avg altitude 101 m min altitude 0 m

HMONG 50-DAY

Chiangmai Thailand

San Phisuea, Chiang Mai Province, Thailand · 6 Dec 2025 · 47.9 km · 3056 m ↑
UTMB World Series Trail 50K L
max altitude 1677 m avg altitude 986 m min altitude 318 m

SUTHEP 20-NIGHT

Chiangmai Thailand

San Phisuea, Chiang Mai Province, Thailand · 6 Dec 2025 · 21.2 km · 1198 m ↑
UTMB World Series Trail Half Marathon M
max altitude 1358 m avg altitude 735 m min altitude 318 m

HMONG 50-NIGHT

Chiangmai Thailand

San Phisuea, Chiang Mai Province, Thailand · 6 Dec 2025 · 47.9 km · 3056 m ↑
UTMB World Series Trail 50K L
max altitude 1677 m avg altitude 986 m min altitude 318 m

Winter on the Downs 55 miles

Winter on the Downs 55/100 miles

Wealden, East Sussex, United Kingdom · 6 Dec 2025 · 89.4 km · 2090 m ↑
Trail XL
max altitude 220 m avg altitude 82 m min altitude 1 m

Winter on the Downs 50k

Winter on the Downs 55/100 miles

Wealden, East Sussex, United Kingdom · 6 Dec 2025 · 50.6 km · 1268 m ↑
Trail 50K L
max altitude 214 m avg altitude 93 m min altitude 1 m

CHEDI 20

Chiangmai Thailand

San Phisuea, Chiang Mai Province, Thailand · 7 Dec 2025 · 16.6 km · 762 m ↑
UTMB World Series Trail M
max altitude 612 m avg altitude 380 m min altitude 318 m

SUTHEP 20-DAY

Chiangmai Thailand

San Phisuea, Chiang Mai Province, Thailand · 7 Dec 2025 · 21.2 km · 1198 m ↑
UTMB World Series Trail Half Marathon M
max altitude 1358 m avg altitude 735 m min altitude 318 m

Arc 100

Arc Of Attrition

Cornwall, United Kingdom · 23 Jan 2026 · 162.6 km · 4414 m ↑
UTMB World Series Trail 100M XXL
max altitude 117 m avg altitude 41 m min altitude 0 m

Arc 50

Arc Of Attrition

Cornwall, United Kingdom · 24 Jan 2026 · 81.3 km · 2205 m ↑
UTMB World Series Trail 50M XL
max altitude 117 m avg altitude 46 m min altitude 1 m

Arc 12

Arc Of Attrition

Cornwall, United Kingdom · 25 Jan 2026 · 19.1 km · 480 m ↑
UTMB World Series Trail M
max altitude 100 m avg altitude 51 m min altitude 5 m

Arc 25

Arc Of Attrition

Cornwall, United Kingdom · 25 Jan 2026 · 40.9 km · 860 m ↑
UTMB World Series Trail Marathon L
max altitude 115 m avg altitude 41 m min altitude 1 m

Hibernal Hills 50k

Hibernal Hills 50k/50 Miles

East Hampshire, England, United Kingdom · 7 Feb 2026 · 52.4 km · 1216 m ↑
Trail 50K L
max altitude 227 m avg altitude 105 m min altitude 30 m
33Fuel Affiliate

*Affiliate link - I may earn a commission if you buy