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Event information

 Join us for the climb from Thredbo to the summit of Mt Kosciuszko on Saturday 13th March, 2021.

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Ticket prices are $80 for adults and $25 for kids under 15 years. Select your start time when you register.

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Sponsor a friend

 All funds raised in the 2021 Kosi Challenge will go to supporting our patient care team and their work with our rare cancer patients.

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Your donation will help the over 52,000 Australians diagnosed each year with a rare and less common cancer.

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The 2021 Kosi Challenge

The 2021 Kosi Challenge has been the biggest we have ever seen and our patients will directly benefit. A huge thank you to all of the participants and donors for this year, we could never have achieved this result without you. Enjoy this little wrap-up video.

raised by 435 fundraisers with over 4282 donations

Help us reach our $500,000 goal

Why we climb

Funds raised go to Rare Cancers Australia Ltd (RCA). Our mission is to improve awareness, support and access to the best treatments and technologies for Australians with rare and less common cancers.

Since its launch in 2013, the event has raised awareness and funds for our cause.

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RARE T-Shirts

RARE branded cotton t-shirts available in Black or White. Each t-shirt comes with velcro letters to create your own personal Kosi message at the front!

T-shirts can be collected from the RCA team in the Lounge Bar, Thredbo Alpine Hotel between 5-7 pm on Friday evening. Alternatively, we can post them out to you prior to Kosi.

White T-Shirts Black T-Shirts


Rare Cancers Australia has partnered with Wotif to assist guests who are attending Kosi Challenge with their travel requirements. The online booking platform offers an alternate option for guests to source accommodation according to their specific needs within proximity to Thredbo.

Book Accommodation

Kosi FAQs

When is the event and what time does it start?

Kosi Challenge is an all-day event on Saturday, 13th March 2021. You must select a start time for your commencement. Due to the high number of participants, it is crucial that you adhere to the times and arrive 20 minutes prior to your start time to allow for registration and event briefing.

Those wishing to take the Chairlift option must choose a start time from 9.00am onwards, as the Chairlift will not be open prior to 9am.

Start times are:
  • 7.15am Merritts Track walkers only
  • 7.30am Merritts Track walkers only
  • 7.45am Merritts Track walkers only
  • 8.00 am Merritts Track walkers only
  • 8.15 am Merritts Track walkers only
  • 8.30 am Merritts Track walkers only
  • 8.45 am Merritts Track walkers only
  • 9.00 am Merritts Track and/or Chairlift
  • 9.15 am Chairlift only
  • 9.30 am Chairlift only

All walkers in all groups have the option of taking the chairlift down the mountain – this is complimentary. But only those who have prepaid and pre-purchased a chairlift ticket can take the chairlift up.

How do I register and when do registrations close?

Go to the registration page. Online registrations close at 12pm on Friday 5th March 2021. Depending on numbers, event registrations may close earlier.

What are the costs? (event registration, chairlift passes, accommodation, and national park entry)
  • Registration: $80.00
  • Chair Lift Pass $25.00
Child (under 15)
  • Registration $25.00
  • Chair Lift Pass $10.00

Discounted accommodation is available for participants. Please contact Nicole Thrum, Events & Groups Manager Thredbo, direct on 02 6459 4184 and mention Rare Cancers Kosi Challenge to receive your discounted room rate.

If you drive your car into the National Park you will be required to purchase a Parking Pass. Cost is currently $17.00 per car per day. 

See website for further information.

What does my registration fee cover?

The registration fee covers administration, event insurance, associated fees and promotion. It also includes a RARE cap which you will be handed when you arrive the morning of the Kosi Challenge.

Since its launch in 2013, the event has raised awareness and funds for our cause.

Read More