Race Details KOSCI 100

RACE DATE Friday 16 Dec 2022
DISTANCE & ELEVATION 100km / +/- 3478m
START LINE Friday Flat – Thredbo NSW


Shuttle services will be available to and from start and finish line venues. Full details closer to the event
FINISH LINE Bullocks Flat – Ski Tube Terminal
ENTRY INCLUSIONS Race entry, athlete t-shirt, finisher medal, finisher gift, finisher certificate, fully stocked checkpoints, drop bag service, on-course medical support and assistance, course photography.
MANDATORY GEAR Standard Mandatory Gear requirements will apply – list to be provided after entries open.
START GROUPS Runners will be contacted regarding Start Group process closer to the event 
MINIMUM AGE 18 years of age on race day.
CUTOFF PACE REQUIRED (min/km) 16:30/km
EXPECTED TIME FINAL FINISHER 27:30:00 (9:30am Sat 17 Dec)
  • Open (18-29yr)
  • Veterans (30-39yr)
  • Masters (40-49yr)
  • Super Masters (50-59yr)
  • Grand Masters (60-69yr)
  • Supreme Masters (70+yr)
  • 1st Place Overall M/F Kosci100
  • 10 Fastest Males and Females receive trophy
  • 5 Fastest Males and Females receive FOC for next year’s event
  • Prizes awarded 1st-3rd in each division
UTMB QUALIFYING 3 Running Stones

All information subject to change


We’ve left no stone unturned when designing the Kosci100 course – made with both the 100km first timer and ultra-endurance junkie in mind.

Following the same route as the KosciMiler for the first 50km, the course kicks off in the alpine village of Thredbo, before taking in highlights like the mountainside Thredbo trails, alpine plateau, Kosciuszko summit and ski village checkpoints.

From there runners will head below the tree line into snow gum forests, with trails twisting and turning beneath the trees, funnelling down to Sawpit Creek before shooting up the Thredbo Valley Trail to the finish line at Bullocks Flat.

Don’t let the sign of mountains fool you – with only 3500m of climbing over the 100km, the Kosci100 is on the much more runnable side, with wide trails and smooth rolling hills. 


Kosci22 100Map2

download PDF

Subject to change pending final approvals

*Note: the 5km section of course between Eagles Nest and Kosciuszko Summit Trail, along the steel mesh walkway, will be a mandatory walking section.


path 4

83% Paths

Walking tracks, single trail

track 2

7% Tracks

Dirt roads, double track

road 7

10% Road

Bitumen roads, tarmac


Checkpoint locations coming soon.

Checkpoints are generously stocked with:

  • Lollies
  • Electrolyte drink (pre-mixed)
  • Water
  • Fruit
  • Bakery goods
  • Hot water, tea, coffee, soup
  • Toilets

Please note we are a cup-less event. In an effort to cut down on waste, we will have no drinking cups at checkpoints. You will need to carry a cup or hydration pack with you. Limited stock of cups and hydrations packs will be available for sale at the event expo, but we encourage you to purchase one in advance and use it in your training.

Signs will be placed 200 metres before each checkpoint and exit signs will indicate the distance to the next checkpoint.

First Aid will be available at each checkpoint and the finish. There will also be roving first aid crews on the course.

If you are using a support crew, you must also read the Support Crew section.

Drop Bags

A drop bag service will be available which allows you to have your own personal supplies (gels, food, change of socks, shoes, shorts, lubricant, etc.) available at certain checkpoints or at the finish.

Your bag needs be closable and soft and a reasonable size. Cool bags from the big supermarkets are perfect! In line with our commitment to sustainability please don’t use plastic bags or plastic boxes – these will not be accepted. One drop bag per runner is allowed for each location.

Checkpoint drop bags can be delivered to the checkpoint trucks at race check-in on Thursday between 10:00am and 7:30pm. Please don't be early, as if not placed directly into the correct checkpoint trucks they may go missing!

Finish line drop bags can be left in the designated area near the start line at Thredbo on Friday morning.

Drop bags will be returned to the drop bag marquee at the Kosci Trail Village within 4 hours after the relevant checkpoint cut-off time. Collect by showing your race number. Any drop bags not collected by 6pm on the Saturday will be disposed of.

  • Please don’t use glass bottles/jars
  • Clearly mark your drop bag using permanent marker pen with:
    • Surname
    • race number
    • checkpoint location
  • At checkpoints and the finish line – drop bags will be lined up numerical order. Any bags without or clearly written/visible with a name and race number, will placed at the end of the number range.
  • Only the runner can collect their drop bag at the drop bag locations. Once each checkpoint drop bag is finished with it must be taken to the used drop bag pile.
  • There is a drop bag service for runners without a support crew. Runners may use a mixture of support crew at some checkpoints and the drop bag service at other checkpoints. Please don’t use the drop bag service for any checkpoints where your support crew will be.

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 only allowed to assist runners at certain checkpoints (full details provided prior to the event)
  • Pacers are not allowed for Kosci100 runners.
  • Support crews cannot run alongside their runners at any point on the course outside of the aid stations.