We're fundraising for...
The Kosi Challenge is the single signature fundraiserfor Rare Cancers Australia (RCA), with the sole purpose of raising awareness and much needed funds for people across Australia impacted by rare and less common cancers.
In March 2026, we will be climbing with hundreds of others, in support of rare, in memory of and with those living with rare themself – together we are a community and Kosi unites us all!
All funds raised through the Kosi Challenge goes directly towards funding the individualised, 360 degree person centred support that RCA’s team of specialist cancer navigators provide for patients, carers and their families.
Thank you so much for your support – now can I get a ‘Kosi, Kosi, Kosi – Oi,Oi,Oi!’
P.S RCA is a Federal Government-classified Health Promotion Charity. All donations are fully tax deductible.
Thank you to our Sponsors
$275
Anonymous
$264
Nicole Muir
Go girl, you’re an inspiration!
$264
Charles
Best of luck son….love what you are doing
$264
Barry Thomas
So proud ❤️
$258
Chris Zaarour
$250
Lauren Pollard
$211
Maria Carubia
Good Luck Tash! What an amazing thing to achieve!
$211
Anonymous
$211
Harry Norton
$200
Rhona Ramsay
Good Luck Lucy
$150
Deb Whitehouse
$106
James Cowan
Happy climbing! Such an amazing commitment to a great cause. You’ve got this 🙌
$106
Andrea Mellon
Go Suzi, what an amazing cause!
$106
Bob Palumbo
Go Andrew!!
$106
Gavin Walsh
Good luck Suzi with your walk for such a wonderful cause. Kind Regards, Gavin
$106
Jeremy Westell
Glad to offer support, Wishing you a strong climb and a safe summit in March 2026.
$106
Judi Stephens
Happy climbing!
$106
Yu And Wes (bernie, Sesame And Gertrude)
Proud of you Pippa! All the best with the climb! ❤️
$106
Michael Strain
Andrew, Great job on raising awareness for RCA! Hope you’re doing well.
$106
Bobby Tang
Go WIN for a great cause!
$106
Allen
$106
Conrad Fleischmann
Go on!
$106
Luke Pearce
Nice work Lauren! Great initiative.
$106
Owen Cox
Good on you Sarah
$106
Colin Albert
Mate you can run up Kosi not hike! Good Luck!
$106
Alan And Rowena Tainton
you go girl !!
$106
Kaye And Andy Donnelly
Go Suzi - imagine the view when you get to the top
$106
John Bryce
Older than Kosciusko!
$106
Jesse, Dean, Nina And Mae
Good luck Adam, enjoy the challenge!
$106
Michelle Ganas
You will smash the climb and your goal 😘
$106
Richard S
$106
Jai Mehta
$106
Charles Davies
Go gurl!!
$106
Dennis Mcgreevy
Good luck! Mum and Dad
$106
Anonymous
$106
Krp
Go Climb that Moderately Large Mountain! :)
$106
Emma Christie
You are amazing Sammy xx
$106
Roz Sinclair
Dear Tash, congratulations on your commitment to this hike- it will be tough but the sense of achievement together with the amazing views at the finish will far surpass anything you imagine. Enjoy & be proud of yourself 💝
$106
Anonymous
$106
Anne-marie Stenglein
Hi Natasha, I had no idea your mum had been diagnosed with a rare blood cancer but super happy that she had responded so well and living life! Good on you to continue the fight to generate vital funds to help in the research to fight this terrible disease. All the best for your climb and to reach (both) your goals. 😍😍
$106
Daniela Rapattoni
$106
Tracey Padman
$106
Hannah Jackson
As it’s only moderately large I expect you to do it very quickly!
$105
Dennis Ruggiero
Be bold enough to dream and brave enough to try, you’ve got this Sooz.
$100
Paul Doyle
Tash - Chris and I realize how important this walk is on so many fronts. Good luck to you and your new work colleagues.
$100
Kirk, Desh, Kaylan And Taj
Go get it Sarah! A great initiative and fitness challenge 💪🏽
$100
Mark Allen
$100
Adam Femino
$100
Steve Bowne
$100
Anonymous
Hola
$100
Jai Mehta
$100
Jai Mehta
$100
Jai Mehta
$100
Jai Mehta
Good luck James
$100
Anonymous
$100
Niki
Great work Aastha!
$80
Christy Brown
Winners win! Let’s GO make a difference!
$54
Bijal Galloway
Rock on, Andrew!
$54
Jenny Cuda
$54
Katrina Vanin
Go go go!!!! You will smash it!!!
$54
Alia Pooley
Go Suzi! 👏💪
$54
Maria Behan
Go Andrew Go! Great cause!
$54
Christine Arndt
I care
$54
Anonymous
$54
Ellen Williams
$54
Di Portelli
Kick arse Suzi - you got this ❤️💪
$54
Sri M
$54
Carm
Such a great cause Pip!! 💕
$54
Jasmine Clark
$54
Court Horncastle
Winners win!
$54
Marc Wells
Good luck Andrew !
$54
Bonita Lazzo
YES YOU CAN!
$54
Aki
Aasthaaaa, I am so proud of you!
$54
Lachlan Best
Going into debt just for you haha
$54
Louis Tsai
$54
Toula Goutzioulis
Good Luck with the climb Sarah!
$54
Sienna Stuart-williams
$54
Tamara Dunstan
Amazing effort for an equally amazing cause. “Cheering you on every step of the way. You’ve got this!”
$54
Mary-jean
Well done Pippa
$54
Justin Keoh
Good luck Sarah!
$54
Kerrie Cornell
$54
Mark ( Woody ) Woodroff
Strength purpose respect and love extended Be blessed mate, well done, Mum would be proud. Miss mine too. God love you
$54
Kim Crowe
$54
Anonymous
$54
Alia Pooley
Amazing work Chris hiking for a great cause 🙌👏💪
$54
Richard Soliman
The message this challenge sends to familes going through hardship is special. Whether it's awareness or financial burden, each person deserves support. Thank you for sharing your story Chris.
$54
Reece Family
Awesome Effort Chris! Good Luck! Thinking of you Love the Reece Crew x
$54
Roula Robotis
Aastha, you got this!
$54
Jess Goodwin
$54
Sheryl Ovens
$54
Manting Gu
$54
Sam Christie
$54
Anonymous
$54
Wayne & Cathy Mc
Good job Pippa!
$54
Filomena Caruso
All the best Natasha.. we look forward to watching you achieve this amazing goal
$54
Robyn & Frank Gerdtz
Good luck Tash. Great effort
$54
Marilia Berriman
Best wishes to your mum and family Kind regards, Colin & Marilia Berriman
$54
Heather Johnston
$54
Lucy Bolan
You’ve got this Nicole! Good luck and wishing you all the very best with it!
$54
Tiff Wardell
Such an important cause - climb well, Nicole!
$54
Emma
Great work Natasha, give your mum a big hug from me.
$54
Lyle Sinclair
$54
Roni
$54
Caitlin Rodrigues
Go Natasha!
$54
Kul S
With you every step -
$54
Mishelle Vidovic
Love Carla,Jack and Mishelle ❤️
$54
Josie
Fantastic challenge Tash good luck xx
$54
Dave Spinks
$54
Lee Fineman
$54
Co Luu
$54
Co Luu
$54
James Munn
$53
Doreen
$53
Nicole Cairns
$50
Gus Maghzal
Wishing all the best in the climb for such worthy cause. Go Tanja.
$50
Val Woolf
Aunty Di would be so proud of you and so are mum and I. 🤗
$50
Denise Femino
$50
Anonymous
$50
Luci Church
👏🏼
$50
Anonymous
$50
Jenni Sinclair
Well done Natasha x
$50
Anonymous
$50
Samuel Carubia
$44
Jessie
$38
Bronte Fyfe
Good cause & great smoothies
$38
Sarah Mellor
Way to go Tanja!!!
$38
Daniela Arturi
A great challenge for a great cause. Go Andrew Kosi, Kosi, Kosi, Oi, Oi, Oi.
$38
Lauren Anelay
$38
Daniela Arturi
Go Suzi - Kosi,Kosi,Kosi Oi Oi Oi. Thank you for raising awareness for a great cause.
$38
Daniela Arturi
Thank you for raising awareness for a great cause. Go Tanja - Kosi,Kosi Kosi -Oi, Oi, Oi.
$38
Angela
Go Tanja!
$38
Linda Kevorkian
$38
Claire Evans
Good luck Kat. Great Cause in honor of your dad x
$38
Mark Mcdonald
$38
Erin Theodossi
Amazing Tanja!!
$38
Anonymous
Love you Natasha xxxx
$38
Katharina
Happy to support this cause! Always remember: Ain’t no mountain high enough 😉
$38
Anonymous
Bin bei dir in Gedanken ❤️
$38
Wendy
Fantastic challenge Lucy for a great cause ! Go smash it !!!!!!!!
$38
Arnas Beržanskis
Wishing you success!
$38
Suzi Davies
$38
Jessica Kent
$37
Jess
$35
Anonymous
$35
Ash Vos
Well done Chris, for keeping up these challenges to remember Ninnie
$35
George K
$35
Vanessa Cinanni
Well done Natasha!
$35
George K
$35
George K
$35
Anonymous
$33
Ryan Mackenzie
Best of luck Lucy, sure you will smash it!
$33
Chris Mcgreevy
$33
Erin Chen
Congrats!
$33
Isabelle Englezakis
Best of luck Tash!
$28
Sarah Lawrence
You got this!
$28
Anonymous
$28
Andrew Thomas
$28
Andrew Thomas
$28
Andrew Thomas
$28
Andrew Thomas
$28
Andrew Thomas
$28
Andrew Thomas
$27
Riju Ray
Great Initiative Andrew! Good luck for your climb.
$27
Doreen
$27
Doreen
$23
Conrad Fleischmann
Awesome stuff!
$23
Adele Mcivor
$23
Caitlin Rodrigues
Go Tanja! Yummy smoothie.
$23
David Fitz-gerald
Go Tanja !
$23
Anonymous
$23
Sheryl Ovens
$23
Katherine Jankovskis
$23
Paula Melhem
$23
Daniela Arturi
What a beautiful thing to do to honour your dad. A great inspiration for his grandchildren. Love it 😊
$23
Tirtha Rane
$23
Aisha Taniwal
Go Natasha!!!
$23
Yasmin Kilic
♥️
$23
Anonymous
$23
Will Glover
Great initiative, it’s a fantastic walk and a good time of year to be up there.
$23
Diane Treagus
$23
Venice Kuai
You got this Tash!! <3
$23
Fade Hanoun
$20
Jessica Lewis
Great cause! All the best
$20
Fade Hanoun
$20
Angela Manos
All the very best with the climb.
$20
Emma Fitzsimons
All the best Katrina
$20
Quang Anh Bui
Conquer Kosi 💪!
$17
Stacy Butler
$17
Sofia Borisenko
$17
Anonymous
$17
Brylie Wilmshurst
good luck!
$17
Cara
$17
Steph Fisher
Proud of you my girl
$17
Agnes Chaumont
The Antibody Avengers
$15
Rory Haisman
Smoothies for Kosi
$15
Anonymous
$15
Georgie Mccolm
$12
Pat Kelly
$12
Sarah Mcpherson
Go Tan!
$12
Eleanor Ashton
All the best with the fundraiser!!
$12
Charlotte Velona
Good luck with the climb! Great job.
$12
Alice Harrison
$12
Emir Coskun
Go Tanja!
$12
Breanna
Don’t die
$12
Anonymous
$12
Flynn
$12
Diren Ananda
Good luck ya bender
$12
Vikram Ananda
$12
Aarav Shah
Let’s go Sammy!
$12
Anonymous
$10
Aizere Malibek
$6
Anonymous
$6
Harry
Good luck with Kosi!
$6
Anonymous
$6
Anonymous
Go Tanja!
$5
Anonymous
$5
Indy
Go mum! So proud of you
$5
Lama Daas
Our Team Members
Chris Zaarour
$695
Katrina Vanin
$836
Suzi MALLIA
$812
Mark Allen
$821
Adam Femino
$330
Lauren Pollard
$356
Tanja Stevanovic
$1,404
Sarah Lawrence
$871
Andrew Thomas
$2,162
Lucy Norton
$646
Pippa Westell
$833
Peter Andrikopoulos
Ally Doyle
Sienna Stuart-Williams
$154
Nicole Biener
$327
Lara Davies
$221
Aastha Nepal
$356
Sam Christie
$575
Ted Gibson
Jamie Schreuder
$100
I am your support crea