K24 Ultra-Trail

How much elevation gain does K24 Ultra-Trail 50km have? The official race website confirms 2,550m D+ over 50km (51m per kilometre). This is verified by a GPX match ('exact official match' per source data). The course ranks 94th most mountainous out of 390 European ultras — only 93 races have more mountainous terrain — and 139th most vertical by D+/km density. The GPX file measures 47.79km (vs 50km declared); the D+ of 2,550m is official and used for all rankings.

Where is K24 Ultra-Trail and how do I get there? K24 Ultra-Trail is based in Črna na Koroškem, a small town in Slovenia's Koroška (Carinthia) region. Public transport is limited — a car is strongly recommended. The three nearest airports are Ljubljana (LJU), Klagenfurt (KLU, Austria), and Trieste (TRS, Italy), all approximately 1–2.5 hours away. Accommodation in Črna is limited; book early, and consider Slovenj Gradec (~25km) as an alternative base.

How hard is K24 Ultra-Trail 50km? Very hard by the data. The course ranks 94th most mountainous out of 390 European ultras. The biggest single descent drops 645m at an average gradient of −8.74% (ranked 92nd most dramatic in the database). Average uphill gradient ranks 107th steepest. With only 15% flat terrain and 2,550m of D+ in 50km, this is a technically demanding alpine race — not a beginner ultra. The course demands both uphill endurance and technical downhill skill.

Is K24 Ultra-Trail 50km sold out? No — the K24 50km has no sell-out history at this distance. Entry for 2026 is €80 (January 1 to May 31, 2026) with no hidden administrative fees. Registration is via https://k24trail.si/en/proge/k24-trail-50km-en/. The race is ITRA certified and first held in 2019. Note: both entry tiers for 2026 may be expired as of race week (August 2026) — verify current registration status directly with the organiser.