Istria 100 by UTMB 

Puerto Vallarta by UTMB®

The Canyons Endurance Runs™ by UTMB®

Grand Raid Ventoux by UTMB

Amazean Jungle Thailand by UTMB

Oh Meu Deus by UTMB

Trail Alsace by UTMB

HOKA Ultra-Trail Australia by UTMB

Ultra-Trail Snowdonia by UTMB®

Rothrock by UTMB

mozart 100 by UTMB

Mountain Ultra Trail by UTMB

Trail 100 Andorra by UTMB

Trail du Saint Jacques by UTMB

Trail of the Kings - Lake Toba by UTMB

Kagaspa Trail Endurance 100 by UTMB

Zugspitz Ultra Trail by UTMB

La Sportiva Lavaredo Ultra Trail by UTMB

Torrencial Chile by UTMB

Western States® 100-Mile Endurance Run

HOKA Val D'Aran by UTMB®

Restonica Trail

Trail Verbier St Bernard by UTMB

Eiger Ultra Trail by UTMB

Monte Rosa Walserwaeg by UTMB

Speedgoat Mountain Races

Bucovina Ultra Rocks by UTMB

Quito Trail Ecuador by UTMB®

Gauja Trail by UTMB

KAT100 by UTMB

Boréalys Mont-Tremblant by UTMB

Ultra Trail Whistler by UTMB

HOKA UTMB Mont-Blanc

Wildstrubel by UTMB®

Snowbasin by UTMB

Malaysia Ultra-Trail by UTMB 

Kaçkar by UTMB

JD Ultra-Trail Great Wall by UTMB®

Paraty Brazil by UTMB

Grindstone Trail Running Festival

Julian Alps Trail Run by UTMB

Nice Côte d'Azur by UTMB®

Chihuahua by UTMB®

TransJeju by UTMB

HOKA Kodiak Ultra Marathons by UTMB

Ultra-Trail Mount Yun by UTMB®

Kullamannen by UTMB

Mallorca by UTMB® 

Ultra-Trail Shudao by UTMB®

Translantau™ by UTMB®

HOKA Pacific Trails California by UTMB

Patagonia BARILOCHE by UTMB

Ultra-Trail Kosciuszko by UTMB

HOKA Chiang Mai Thailand by UTMB®

Oman by UTMB®

Tarawera Ultra-Trail by UTMB

Chianti Ultra Trail by UTMB

Ultra-Trail Mogan by UTMB®

Desert RATS Trail Running Festival by UTMB

Ushuaia by UTMB

Tenerife Bluetrail by UTMB®

2026 Warhorse Ultra-Trail Xiamen by UTMB®

Xtrail by UTMB®

Arc of Attrition by UTMB®

Puglia by UTMB

Aonijie

Buff

Compressport

Lesseau

Rudy Project

Sidas

Shokz

Vibram

Nirvana

Istria 100 by UTMB

Hoka

Naak

Suunto

YOUR RACE DAY ESSENTIALS

START CITIES

RUNNER GUIDE

MANDATORY GEAR

GPX FILES

LIVE TRACKING

Discover the races

distance

elevationGain

startDate

categoryWorldSeries

runningStones

The course starts in the 3000 years old town Labin, climbs the Učka mountain with the spectacular views to Kvarner region and descends in Buzet where your drop bag will wait for you.

168K

The second largest course start from Buzet and offers you typical istrian inland trails. After first 20 km, the 110K trail merges with 168K trail and continues the climb to the highest peaks of Istria.

110K

This trail will show you Central Istria in all its glory! The trail starts in the old town of Buzet and takes the shortest route to Butoniga lake, and it finish in the city of Umag.

This course is great for beginners in trail running. It starts at the bottom of the medieval town of Motovun, climbs up the second medieval town of Grožnjan, and merges with the other courses all the way to the seafront in Umag.

The shortest course is for everyone who would like to experience trail running for the first time.

2025 Highlights Video

WS Blue

Join the UTMB community and create an account!

Join The Community

global-Europe-1

global-Europe-2

YOUR RACE DAY ESSENTIALS

Discover the races

2025 Highlights Video

Sign up for Istria 100 by UTMB Announcements