Set against the captivating backdrop of Croatia’s Istrian Peninsula, the Istria 100 by UTMB will return from 9 to 12 April 2026, concluding in the vibrant coastal town of Umag. As a revered event in the UTMB World Series, it offers five trail-running experiences to suit every level—ranging from the epic 100-mile (168 km) test of endurance to shorter challenges of 110 km, 69 km, 42 km, and 21 km. Each route meanders through medieval hilltop towns, dense forests, dramatic canyons, and sparkling coastline, delivering a mix of technical terrain, panoramic vistas, and cultural charm. Whether you're chasing distance or discovery, this event transforms Istria’s ancient landscapes into a playground for ultra runners and adventure seekers alike.
Race
168 km
Race Date:
10 April, 2026
The Istria 100 by UTMB 168K takes place on Friday, 10 April 2026, starting from the ancient town of Labin atop Istria’s rugged interior and finishing in the coastal city of Umag, Croatia. This monumental ultratrail pushes runners across 168 kilometers of medieval hilltops, dense forests, and undulating terrain, with a staggering 7,140 meters of elevation gain, delivering an epic and unforgettable trail adventure.
Weather based on historical averages.
FAQs
What is the Istria 100 by UTMB 168K?
How long is the Istria 100 by UTMB 168K?
Where does the Istria 100 by UTMB 168K take place?
What is the elevation gain of the Istria 100 by UTMB 168K?
How can I prepare for the Istria 100 by UTMB 168K?
How do I choose the right training plan for the Istria 100 by UTMB 168K?
The Istria 100 by UTMB 168K takes place on Friday, 10 April 2026, starting from the ancient town of Labin atop Istria’s rugged interior and finishing in the coastal city of Umag, Croatia. This monumental ultratrail pushes runners across 168 kilometers of medieval hilltops, dense forests, and undulating terrain, with a staggering 7,140 meters of elevation gain, delivering an epic and unforgettable trail adventure.
The Istria 100 by UTMB 168K is 168km long.
The Istria 100 by UTMB 168K takes place in Buzet, Istria, Croatia.
The Istria 100 by UTMB 168K elevation gain is 7140 metres, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Istria 100 by UTMB 168K?
The Istria 100 by UTMB 168K takes place on Friday, 10 April 2026, starting from the ancient town of Labin atop Istria’s rugged interior and finishing in the coastal city of Umag, Croatia. This monumental ultratrail pushes runners across 168 kilometers of medieval hilltops, dense forests, and undulating terrain, with a staggering 7,140 meters of elevation gain, delivering an epic and unforgettable trail adventure.
How long is the Istria 100 by UTMB 168K?
The Istria 100 by UTMB 168K is 168km long.
Where does the Istria 100 by UTMB 168K take place?
The Istria 100 by UTMB 168K takes place in Buzet, Istria, Croatia.
What is the elevation gain of the Istria 100 by UTMB 168K?
The Istria 100 by UTMB 168K elevation gain is 7140 metres, which Runna classifies as a Hilly race.
How can I prepare for the Istria 100 by UTMB 168K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Istria 100 by UTMB 168K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
UTMB
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Istria 100 by UTMB 2026 or Ultra-Trail du Mont-Blanc (UTMB). All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Istria 100 by UTMB 2026 website.