On-Mountain
Ultra-Trail Kosciuszko
Thursday 27 - Saturday 29 Nov, 2025
There’s nothing quite like the feeling of running high – whether it’s the rush of fresh alpine air, the unbeatable mountain views, or the pure exhilaration of pushing your limits on the trails. From the KosciMiler to the Kosci30, every course has been uniquely designed by trail runners, for trail runners. UTA founder Tom Landon-Smith leads the course team, and they’ve created what can only be described as pure trail running bliss. Super runnable trails, stunning scenery, achievable elevation gain, and unrivalled support crew access make this ultra-trail running at its best.
All four races finish in the heart of Thredbo, just a 30-minute drive from Jindabyne.
New to trail running? The Kosci30 is the perfect introduction. With non-technical trails and breathtaking alpine scenery, it’s a chance to experience the freedom and exhilaration of running off-road – something road running just can’t match.
The Kosci50 is the ideal step up from a marathon, offering both the prestige of an ultra-distance race and one of the most achievable ultra experiences out there. Smooth, flowy trails, a balanced mix of elevation, and incredible support make it an unforgettable challenge.
For the seasoned trail runner and endurance athlete, the Kosci100 is a must. Bringing the alpine ultra experience to Australia, this race takes you through open meadows, snow gum forests, and to the summit of Mt Kosciuszko before winding through mountain villages and finishing on the Thredbo Valley Trail. Don’t be fooled by the word ‘alpine’—the course is designed to be runnable, making it a great option for first-time triple-digit runners and experienced ultra-athletes alike.
For the ultimate test of mind and body, the KosciMiler delivers a premier 100-mile experience in Australia. From the summit of Mt Kosciuszko to the shores of Lake Jindabyne, with endless trail bliss, alpine scenery, and ski villages in between, this is a journey you’ll never forget.
Find Out More
The best way to enjoy the race weekend is to stay in Thredbo Village, close to all the action.
Accommodation is booking out quickly! Check availability online or call Thredbo Reservation Centre on 1300 020 589.
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Thredbo sits on the traditional land of the Monero – Ngarigo people who have looked after this land, water and community for over 60,000 years. We thank them for all they have done and continue to do to look after their country, a special place which we all love and respect.












