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Iron Ultra Trail
105km10553km53

Half Iron

53.0km·1950m+
May 8
Valjevo,
Serbia
source

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: Serbia

  • Gledić Ultra trejl · Jelen (ultra)October 31, 2026 · 58.0km · 2050m+
  • Gledić Ultra trejl · SrnaOctober 31, 2026 · 22.0km · 930m+
  • Winter Trail Race na Fruškoj gori · Winter Trail RaceDecember 27, 2026 · 17.0km
  • Sova Night Trail · Red RaceNovember 7, 2026 · 15.0km
  • Gledić Ultra trejl · LaneOctober 31, 2026 · 12.0km · 530m+
  • Sova Night Trail · Blue RaceNovember 7, 2026 · 10.0km

Read

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  • Hill Training for Trail Runners: Train the Descents
  • Downhill Running Muscle Damage: Why Descents Wreck Quads

Full calendar: Serbia50K trail race calendar

About Half Iron

Half Iron is the 53.0km ultra trail at Iron Ultra Trail 2026 (Valjevo, Serbia). The race starts on May 8, 2026.

Course

The course climbs 1950m+. With 37m/km of climbing, this is a rolling, mostly runnable course. Flat-equivalent effort: 69.9 FlatKM.

Results

32 finishers completed the 2026 edition. Men's winner: Velibor Zečević (Individual Neutral Athletes) in 6:25:49. Women's winner: Marija Reljić (Individual Neutral Athletes) in 9:47:58.

This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Half Iron.

Other distances of Iron Ultra Trail 2026Full Iron (105km)

Other editions of Half Iron2025

Official websitetrka.rs/events/805-iron-ultra-trail