Kosci100
Bringing the alpine ultra experience to Australia, the Kosci100 takes you through alpine meadows and snow gum bush, as well as to the summit of Australia’s highest peak – Mt Kosciuszko
Race Category
Running Stones
3
Finals Access
Whether you’re tackling triple digits for the first time or are an experienced ultra-junkie – the Kosci100 is a delight. Super runnable trails will keep a smile firmly attached to your face while they take you through alpine meadows and past granite outcrops, through crystal clear streams and over the summit of Australia’s highest point – Mt Kosciuszko. With unrivalled support crew access, an epic social buzz and a highly achievable course, this is 100km of trail running bliss you won’t want to miss.
RACE DETAILS
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FRIDAY 28 NOVEMBER 2025 |
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| ENTRY INCLUSIONS | Race entry, athlete t-shirt, finisher medal, finisher gift, fully stocked checkpoints, drop bag service, on-course medical support and assistance, course photography (able to purchase during rego). |
| TRANSPORT | Shuttle services will be available to the start venue. Details on the Transport & Parking page. |
| MANDATORY GEAR | All runners must carry mandatory gear during the race. Details are on the Mandatory Gear page. |
| MINIMUM AGE | 18 years of age on race day |
| TOTAL ALLOWABLE TIME | 28 hours |
| CUTOFF PACE REQUIRED | 3.76 km/hr |
| FIRST FINISHER | 8hr 10min (3:10pm) |
| FINAL FINISHER | 28 hours (11:00am, Saturday) |
| TIMING RESULTS | The following age divisions for both male and female will be used for race results (age on 31 December 2025 will be used determine your age division): 18-19, 20-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75-79, 80-84, 85+ |
| AWARDS & PRIZES | All Kosci100 finishers will receive a finisher medal. Prize money will be awarded to the top 3 overall male and female finishers, and is based on the participant's gun time. 1st place $1,000, 2nd place $750, 3rd place $500. 10 fastest male and females receive a trophy 5 fastest male and females receive free entry to the following year’s event. Trophies will be awarded to 1st in each age division |
| UTMB World Series |  The Kosci100 is a UTMB Worlds Series 100K Event. Finishers of Kosci100 will receive 3 running stones. |
COURSE DESCRIPTION
Made with both the 100km first timer and ultra-endurance junkie in mind, the Kosci100 course is about as fun as 100km running can get.
Starting in the ski hub of Perisher, the Kosci100 takes on epic trails, with stunning views and a true alpine experience.
Runners will complete a small starting loop before hitting the Snowies Alpine Walk, connecting them along the ridgeline overlooking the Thredbo Valley as they traverse up to Charlotte Pass.
From here runners ascend to the Summit of Mt Kosciuszko, the highest point on Mainland Australia, before making their way out along the Main Range Walking Track towards Guthega.
From here, they'll make their way back round to Perishers via Smiggin Holes, before descending down the new Perisher to Bullocks track into Bullocks flat, before the final jaunt up the valley to Thredbo.
It's not over just yet, as runners complete a loop of the Thredbo Ski area to complete their 107km journey!
*Maps subject to change, and may change for reasons outside of the Race Orgaisers control. Select the Time Charts tabs to view the cut-off times for leaving the relevant checkpoint. Time Charts show estimated fastest and slowest times for each race leg and should be used as a guide only. Where the slowest times are greater than cut-off time, the cut-off time will supersede the slowest expected estimates. If you miss the cut-off then you must follow the directions of officials. Please note that in bad weather conditions, cut-offs may need to be brought forward during the event.
KEY INFO FOR KOSCI100 RUNNERS
All the information you need to know before starting an extraordinary adventure.
SUPPORT CREW
We love support crews almost as much as our runners at Ultra-Trail Kosciuszko by UTMB – you are always the most colourful (and loudest!) and a huge part of the magical atmosphere of the whole weekend.
You also have the very important job of getting your runners to the finish line.
First job for support crew is to read the support crew section in the Runner Guide, available one month before the event. It contains important information you will need to know for the event.
To keep the event manageable as well as fair and safe for all athletes, and to make sure support crews do not get lost, there is some information that support crews need to know.
- Support crews are allowed to assist runners at all Checkpoints marked above as supported.
- Support crews can access Eagles Nest waterpoint via the Kosciuszko Express Chairlift. You can book lift passes here.
- Support crews may only assist their runners within 500m either side of the checkpoints. Support Crews cannot run alongside their runners at any point on the course outside of the checkpoints.
- Pacers are not allowed for athletes in the 100k distance.
For more helpful information please visit the Transport & Parking page and Spectators page.
