How to Find Trail, 24H, 50K, and 100K Information on the IAU Website

Updated

The IAU website (iau-ultramarathon.org) organizes its ultrarunning content around four discipline headings: Trail, 24 H, 50 K, and 100 K. These headings are your entry points — select the one matching the distance or format you care about, and you'll land in that discipline's section of the site. This guide covers how to use that structure and what to expect at each stop.

Start With the Discipline Headings

The homepage presents the four categories as top-level navigation labels. They function as gateways rather than standalone articles, so treat them as the first click in a two-step path:

  1. Identify your discipline. Match your interest to the label — trail running, 24-hour timed events, 50 km, or 100 km.
  2. Select the heading. Each label leads to content scoped to that discipline rather than a general news feed.
  3. Read within the section. Once inside, expect material specific to that format: event information, results, and announcements relevant to that distance or style.

The labels are short by design. "24 H" means 24-hour timed racing, "50 K" and "100 K" are road ultramarathon distances, and "Trail" covers off-road ultradistance events. Knowing this mapping prevents wrong turns — a 100 km trail race sits under Trail, not under 100 K.

What Each Section Is Likely to Contain

The site describes itself as the international governing body for ultradistance running, with promotion and development of long-distance running among its main objectives. That mission shapes what the discipline sections hold. Based on the visible structure:

Heading Discipline What to look for
Trail Off-road ultradistance Trail-specific events and championships
24 H Timed running (24 hours) 24-hour event coverage and records
50 K Road ultramarathon 50 km championships and results
100 K Road ultramarathon 100 km championships and results

Championship announcements appear on the site as news items — for example, the homepage highlights "Croatia to Host the 2027 IAU 100 km European Championships," dated 8 October 2026. This shows the pattern: major event news surfaces on the front page and connects to the relevant discipline. If you're tracking a specific championship, check both the discipline heading and the news area.

A Practical Browsing Routine

For a task like "find out what 100 km championships are coming up," the efficient path is:

  1. Open the homepage and scan the news headline area for recent championship announcements.
  2. Click the 100 K heading to reach distance-specific content.
  3. Cross-check the announcement against the discipline section to confirm the event's category.

For a broader question — say, which formats the IAU governs — the four headings themselves answer it: trail, 24-hour, 50 km, and 100 km are the covered disciplines. No deeper page is needed to establish that scope.

Common Sticking Points

  • Expecting a search-first experience. The discipline headings are the primary organizing device; start there rather than hunting for a search box.
  • Confusing distance with surface. A 100 km trail race belongs under Trail. Use the surface to pick the section, then the distance to filter within it.
  • Looking for a single master calendar. The visible structure is discipline-based, so event information is distributed across the four sections rather than centralized.

Bottom Line

Use Trail, 24 H, 50 K, and 100 K as your navigation anchors on iau-ultramarathon.org. Pick the heading that matches your discipline, read the discipline-specific content inside, and watch the homepage news area for championship announcements like the 2027 100 km European Championships in Croatia.