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Istria 100 by UTMB
100 mi100K50K20KRegistration open

Istria 100 by UTMB

Umag, Istria, CroatiaUTMB
Days to go
161
Registeristria.utmb.world

At a glance

Date
Apr 1–4, 2027
Location
Umag, Istria, Croatia
Distances
100 mi, 100K, 50K, 20K
Registration
Open, via istria.utmb.world
Competition
UTMB World Series

Listed from UTMB Index. Checked Oct 18, 2026.

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About this race

ISTRIA 100 by UTMB started in 2013 and today it gathers more than 3000 runners from all over the world. In 5 distances, courses combine every aspect of Istria: difficult and technical terrain, little bit of coasteering, old medieval towns, deep forests, city centres, muddy wallies, streams and brooks, canyons and many beautiful panoramas.

Key dates

Race day

Apr 1, 2027

161d

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Straight-line distance

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