100 Miles of Istria

Umag, Croatia
11-13 Apr, 2025 (Fri - Sun)
Event size:  (Max 3000 participants)

Trail running

13.2 km, 26.1 mi, 42.9 mi, 68.3 mi, 104.7 mi

About the event

Numerous sports and active holiday lovers will find enough reasons to come to Istria even in the winter months, but the first days of spring bring a bounty of activities providing everyone with a reason to visit Istria - both recreational and extreme sports enthusiasts. And this will be confirmed once again in April when Istria is hosting a ultra trail event 100 Miles of Istria.

We are delighted to invite you to the eighth edition of the ultra trail race "100 miles of Istria". We are particularly proud to point out that as many as 1760 competitors from 54 countries participated in the seventh edition of the race! It is the qualification race for the unofficial world trail championship Ultra-Trail du Mont Blanc. All the finishers receive ITRA and UTMB qualification points.

The 100 miles course is the hardest and the most beautiful course that we offer. It stretches from the eastern part of Istria, over its highest mountain down to the mainland, and ends on the western part of the peninsula in the city of Umag. Along the route, you will experience every possible aspect of trail running – really technical terrain, a little bit of coasteering, old medieval towns, deep forests, city centers, old train route, muddy valleys, all spiced up with breathtaking panoramas. The course starts in the 3000 years old town Labin, climbs the Učka mountain and descends in Buzet where your drop bag will wait for you. After the well-deserved rest, the trail leads you to the medieval pearl Motovun and back to the finish in Umag. 168 km with 6.390 m doesn’t seem so hard but trust us, this course is very demanding and it shouldn’t be taken lightly.

The second-largest course offers you “the climb”, right in the beginning, from the sea level directly to the top of the Učka mountain at 1400 m above sea level, all that in just 8 km. Reaching the foot of the mountain peak, the 128 km trail merges with the 100 miles and follows it till the end in Umag. As for the terrain, the part that leads to Buzet is very rocky and demanding, but it gets easier towards the finish in Umag. While 128 km with +4.940 m probably doesn’t sound very demanding, it is nevertheless very challenging, especially if you bear in mind that you will have to cross the mountain during the night.

The third course, 67 kilometers long trail with the climb of +2.150 m is an excellent start for participants who would like to try the 128 km or 100 miles trail next year.

The fourth course starts at the bottom of the town of Motovun, climbs up the town and merges with the 100 miles trail. With the elevation difference of 1.100 m and a time limit of 10 hours, this trail is not very challenging, but nevertheless has all the elements of a real trail race: it leads you through steep climbs and slopes, wide paths, intact single tracks and charming hill towns – a real treat!

The shortest course is quite a novelty and is dedicated to the absolute trail running beginners. It starts from the town of Grožnjan and ends in Umag. Very easy, mostly downhill.

Races offered by this event

You have 26 weeks to prepare

168K

11 Apr, 2025 (Fri) - 17:00
Trail running
104.7 mi
21620 ft of elevation gain
6690 m of elevation drop
Start line: Labin, Croatia
Finish line: Labin, Croatia
The 100 miles course is the hardest and the most beautiful course that we offer. It stretches from the eastern part of Istria, over its highest mountain down to the mainland, and ends on the western part of the peninsula in the city of Umag.

Along the route, you will experience every possible aspect of trail running – really technical terrain, a little bit of coasteering, old medieval towns, deep forests, city centers, old train route, muddy valleys, all spiced up with breathtaking panoramas. 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.

After the well-deserved rest, the trail leads you into the mainland, filled with small medieval towns such as Motovun – the Istrian pearl and back to the finish in Umag.

By looking at the course profile, it doesn’t seem that hard but trust us, this course is very demanding and it shouldn’t be taken lightly.
UTMB qualifier
Western States qualifier
Solo
On site
Trail
Extreme
Point to point
Timed
Certified course
Mountain range
Night
City
Historical
Scenic
Wine
Beer
Castle
Rural
Forest
Seaside / Lakeside
Sunset
Beach

110K

12 Apr, 2025 (Sat) - 07:00
Trail running
68.3 mi
12664 ft of elevation gain
4940 m of elevation drop
Start line: Lovran, Croatia
Finish line: Lovran, Croatia
The second-largest course offers you “the climb”, right in the beginning, from the sea level directly to the top of the Učka mountain at 1400 m above sea level, all that in just 8 km. Reaching the foot of the mountain peak, the BLUE trail merges with RED trail and it follows it to the end in Umag.

As for the terrain, the part that leads to Buzet is very rocky and demanding, but it gets easier towards the finish in Umag.

While 128 km with +4.940 m probably doesn’t sound very demanding, it is nevertheless very challenging, especially if you bear in mind that you will have to cross the mountain during the night.
UTMB qualifier
Solo
On site
Trail
Extreme
Point to point
Timed
Certified course
Mountain range
City
Night
Beach
Historical
Scenic
Wine
Beer
Castle
Rural
Forest
Seaside / Lakeside
Sunset

69K

12 Apr, 2025 (Sat) - 09:00
Trail running
42.9 mi
7283 ft of elevation gain
2200 m of elevation drop
Start line: Buzet, Croatia
Finish line: Buzet, Croatia
This trail will show you Central Istria in all its glory and it brings you 3 UTMB points!

Although arduous, it is a great option for participants that are a bit less experienced in trail races. However, it still offers an opportunity to experience all the aspects of trail running – strenuous climbs, steep slopes, crossing creeks, as well as muddy and rocky terrain. At the same time, it leads through the beautiful medieval towns of Motovun, Oprtalj, Završje, and Grožnjan.

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. As for the terrain, expect large stretches of softer surfaces, combined with the all-present Istrian rock.

The 67 km long trail with the climb of +2.150 m is an excellent start for participants who would like to try RED or BLUE course next time.
UTMB qualifier
Solo
On site
Trail
Hilly
Mountain range
City
Historical
Scenic
Wine
Beer
Castle
Rural
Forest
Mud
River
Seaside / Lakeside
Sunset

42K

12 Apr, 2025 (Sat) - 12:00
Trail running
26.1 mi
3116 ft of elevation gain
1030 m of elevation drop
Start line: Grožnjan, Croatia
Finish line: Grožnjan, Croatia
This course is dedicated to the beginners in trail running. It starts at the bottom of the town of Motovun, climbs up the town and merges with the other courses. With the elevation difference of 940 m and a time limit of 8 hours, this trail is not very challenging, but nevertheless, has all the elements of a real trail race: it leads you through steep climbs and slopes, wide paths, intact single tracks and charming hill towns – a real treat!

An only limiting circumstance is a limited number of 600 participants – hurry up and apply!
UTMB qualifier
Solo
On site
Trail
Hilly
Timed
Certified course
Mountain range
City
Historical
Scenic
Wine
Beer
Castle
Rural
Forest
Mud
River
Seaside / Lakeside
Sunset

21K

13 Apr, 2025 (Sun) - 10:00
Trail running
13.2 km
426 ft of elevation gain
360 m of elevation drop
Start line: Grožnjan, Croatia
Finish line: Grožnjan, Croatia
This is our shortest course and it is dedicated to the beginners in trail running, supporters and volunteers. It starts from Grožnjan and ends in Umag like all other courses. With the elevation difference of 140 m and a time limit of 4 hours, this course is not challenging at all.

An only limiting circumstance is a limited number of 600 participants – hurry up and apply!
Solo
On site
Trail
Rolling
Point to point
Timed
Mountain range
City
Historical
Scenic
Wine
Beer
Castle
Rural
Forest
Mud
River
Seaside / Lakeside
Sunset
Downhill

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