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📅 April 9, 2027 (estimated date)📍 Umag · Croatia

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (April 10, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

21 km42.195 km69 km109.9 km168.5 km

Races on the programme

RaceDistanceElevation gain
168K—6,590 m
110K—3,860 m
69K—2,220 m
42K—950 m
21K—130 m

About

The 100 Miles of Istria is an endurance trail event in Istria, Croatia, finishing in Umag and running from 9 to 11 April 2027. It attracts participants from around the world and serves as a qualifier for the Ultra-Trail du Mont-Blanc.

The event offers several courses of varying difficulty, crossing technical terrain, mountains, forests, medieval towns and picturesque landscapes. The routes start from places such as Labin, Motovun and Grožnjan, and all finish in Umag. Designed for experienced ultrarunners and newcomers alike, it features tough climbs, rugged trails and a range of experiences suited to trail runners of different levels.

  • 168K: 168.5 km, 6,590 m elevation gain, 9 April at 17:00
  • 110K: 109.9 km, 3,860 m elevation gain, 10 April at 7:00
  • 69K: 69 km, 2,220 m elevation gain, 10 April at 9:00
  • 42K: 42.2 km, 950 m elevation gain, 10 April at 12:00
  • 21K: 21 km, 130 m elevation gain, 11 April at 10:00
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