A point-to-point traverse of the entire Istrian peninsula, from ancient Labin to the Adriatic coast
Other trail races within 139 miles
The flagship event of Istria 100 traverses the entire Istrian peninsula in a dramatic point-to-point journey from the ancient hilltop city of Labin to the coastal resort of Umag. The course climbs Učka, Istria's highest peak, before descending to Buzet where drop bags await, then winds through the inland karst landscape past medieval towns including Motovun. Runners contend with relentlessly technical limestone terrain, creek crossings, and rooty forest trails — all in a package that looks easier on the profile than it runs.
Experienced ultrarunners
Labin, CroatiaApril 10, 2026
Must meet custom qualifier requirements within the qualification window
Requires UTMB Running Stones 4, earned by completing qualifying UTMB World Series races. Qualification verified through the UTMB runner account system.
| Location | km | Elevation |
|---|---|---|
Labin Start | 0.0 | 293 m |
Plomin Luka Aid Station | 15.7 | 2 m |
Mošćenička Draga Aid Station | 34.8 | 5 m |
Poklon Aid Station | 51.4 | 938 m |
Brgudac Aid Station | 66.1 | 731 m |
Trstenik Aid Station | 83.3 | 684 m |
Buzet Aid Station | 98.6 | 76 m |
Butoniga Aid Station | 115.3 | 34 m |
Livade Aid Station | 130.9 | 12 m |
Grožnjan Aid Station | 146.6 | 284 m |
Buje Aid Station | 153.5 | 150 m |
Umag Finish | 168.3 | 1 m |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
April in Istria brings classic spring conditions — mild days (10–18°C) but cold nights (5–10°C), particularly on Učka mountain and the inland karst plateau. Spring rain is common and can make limestone terrain treacherously slippery. Wind is a factor on exposed ridgelines above Učka. Runners starting the 168K at 17:00 will spend their first overnight in colder conditions before warming conditions return the following day.
April spring rains are common across Istria; wet limestone rock becomes extremely slippery on technical descents
Nighttime temperatures can drop to 5°C or below, especially at elevation on Učka mountain; mandatory gear list addresses this
Conditions can change quickly in spring; Učka summit is significantly cooler and windier than coastal areas
No required gear specified
No recommended gear specified
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