woman walking on green grass field

Ultra-Trail Australia by UTMB 100K

100K·Katoomba, New South Wales
ultra100 mile100k50kmountaintechnicaltrailqualifierloopmarathon

Photo by Massimo Sartirana on Unsplash

Distance100K
Date14 May 2026

Registration is closed for Ultra-Trail Australia by UTMB 100K

Get alerted if spots open up or when next year's registration goes live.

About This Race

The 100K distance strikes a compelling balance between the accessibility of UTA's shorter options and the extreme commitment required for the 100-mile challenge. Runners face the full spectrum of Blue Mountains terrain over approximately 12-15 hours, requiring careful pacing and fueling strategies as they navigate multiple significant climbs while managing the technical rock scrambles that become increasingly demanding on tired legs. This distance attracts experienced ultrarunners seeking a substantial challenge without the multi-day recovery typically associated with 100-mile efforts, making it an ideal step up for those progressing through UTA's distance offerings.

Practical Info

Nearest Airport

SYD - Sydney Kingsford Smith Airport

Accommodation

Katoomba offers various accommodation options in the Blue Mountains, with the event hub located at Scenic World.

Best For

ultrarunnersmountain runnersexperienced trail runners

Notable Features

UTA stands out for its deep connection to indigenous Australian culture and its stunning Blue Mountains setting. The event incorporates Welcome to Country ceremonies and traditional yidaki music, while runners experience World Heritage-listed landscapes featuring dramatic cliff formations, waterfalls, and diverse native ecosystems. As Australia's premier trail running festival and part of the prestigious UTMB World Series, it offers distances from 1K to 100 miles with a strong emphasis on community and cultural respect.