We're fundraising for... all people and patients affected by rare and less common cancers.
We are climbing for rare.
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 we can 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
$279
Jules
$264
Andrew Tayler
Good luck on your climb!!
$264
Creative Advocacy Solutions
Matched donation by Creative Advocacy Solutions ⚡️
$264
Kate S
Nice job!
$264
Creative Advocacy Solutions
Matched donation by Creative Advocacy Solutions ⚡️
$264
Patricia Tayler
So proud of you for accepting this challenge for such a worthy cause. Will be cheering for you
$264
Pete & Georgie
$206
J&t Mills Donation
Best of luck for this wonderful cause Josie & Tara
$158
Meaghan Clarke
$158
Jackson Salloch
$158
Sam F
Yay team! - Your guys are awesome for taking on this challenge (again)
$150
Anonymous
Great initiative , good luck!
$113
Malcolm Down
$106
Meredith Salloch
An extremely worthy cause.
$106
Malcolm Down
$106
Maddy Turner
go mum 💪🏽🥾
$106
Fiona And Doug
$106
Creative Advocacy Solutions
Matched donation by Creative Advocacy Solutions ⚡️
$106
Anonymous
$106
Anonymous
$106
Anonymous
$106
Jo Richards
$106
Ginny
Go Kris! Great work.
$106
Matt Mcfarland
$106
Clay
Good luck, mate
$106
Harry Turner
$106
Creative Advocacy Solutions
Matched donation by Creative Advocacy Solutions ⚡️
$106
Michelle Ang
Way to go, Malcolm! :)
$106
Carmel Blake
You are Awesome Caz
$106
Gavin Walsh
Good luck Masaaki with your walk for such a great cause. Kind Regards, Gavin
$106
Anonymous
🥾🥾
$106
Pk & B
Well done on a worthy cause mate xoxox
$106
Natalie Down
$106
Jennifer Grierson
Wonderful lady helping out another wonderful lady. ❤️
$106
Andrew
$106
Talsar
Great Job guys
$106
Kerry Lindsey
Go Girl!!!! For a great cause!!!!
$106
Cindy
For Jacqui❤️
$106
Kristina
$106
Damo Hart
Enjoy the walk mate and what a great cause
$106
Simon C
$106
Mandy
Go Kris! Great cause.
$100
Dan R
Go Mal!
$100
Tracey Mcdonald
$100
Mason Down
$100
Paul Crighton
Good luck mate. All the very best on supporting this great cause.
$100
Andrew Nicolson
$100
Beau
Great cause Mal, good luck
$100
Anonymous
$69
Carolyn Mcfarland
$62
Natalie
Go for it Masaaki!
$55
G
Go sweetheart! Muaaaaah xx
$54
Liz
$54
Suzanne Maybury
Amazing Nat, well done you!
$54
Anonymous
$54
Suzanne Maybury
You are a wonderful human Mal, all the best to you and Nat for the #KOSIChallenge2026!!!
$54
Sharon Leadbitter
You go girl!
$54
Masaaki Kotaki
$54
Natalie Down
$54
Carolina Monge
Good luck 🤞
$54
Robyn Green
Well done Kris! Huge effort.
$54
Deb Hooper
Go ❣️ Mark
$54
Shane Dobson
$54
Maree Barnes
$54
Bas Bremmer
Amazing effort you’ve put into both the climb and the fundraiser. You should be really proud of what you’ve accomplished and the impact you’re making. The cause you’re supporting is a very good one and it’s something that’s close to my heart, so it means a lot to see people like you putting in the effort to raise awareness and support. Well done mate, and here’s to many more summits ahead!
$54
Chifumi Umeda
Looking forward to tackling the challenge together!
$54
Natasha Mcdermott
$54
Cath Kench
Congratulations! & Well Done!
$54
Lachie
Go Mum! ❤️
$54
Creative Advocacy Solutions
Matched donation by Creative Advocacy Solutions ⚡️
$54
Ray Barnes
Go Andie.....
$54
Ariane Paguia
Goodluck Mal
$54
Maria Shcherbakova
$54
Matt Shaw
Great cause Mall, all the best
$54
Archie
Goooo Andie 💕
$54
Archie Mcfarland
💕💕💕
$54
James Thomas
All the best Mal! Good luck
$54
Anonymous
Good luck Nat!
$54
Creative Advocacy Solutions
Matched donation by Creative Advocacy Solutions ⚡️
$54
Fiona Cross
Enjoy the walk, enjoy the view and thank you 🙏
$54
Archie And Holly Turner
$54
Steve K
Happy Hiking Mal! Let me know if you see any trout in the streams!
$54
Manish Bhardwaj
All the best, Mal
$54
Suz
Go Nat! This is awesome 🙌🏻
$54
Brian Lee
$54
Katie Ellegard
Huge well done for all the fundraising team! Good luck and have fun
$54
Brian Lee
$50
Lily Russell
$50
The Ordish’s
Get it Sandy - proud of you 🫶🏼
$50
Isabella Lowndes
$50
Kim Scott
Great work, team DSAU. Stay hydrated and sun smart up there! Looking forward to seeing a picture from the summit.
$43
Carole Clisdell
$40
Oliver Rathje
What a great cause! All the best for the climb.
$38
Manpreet
Well Done Malcolm great cause, enjoy the hike.
$38
Kyli
Awesome thing to do Mark proud of you xx
$38
Stephen Slunsky
Malcolm good luck on your Kosi Challenge!
$38
Lisa Pavey
Go you good thing Nats. Well done on completing the hike!
$38
Danni Liu
Go Kristina! Been meeting to do this challenge for several years now. Hope to join next year. =)
$38
Sarah B
Well done!!
$38
Maria Shcherbakova
$38
Brian Gormley
All the best!
$38
Brian Lee
$38
Anna Clisdell
Get it gurl!! 🙌🫶
$38
Anonymous
$37
Cass Holt
$37
Fiona Featherstone
$35
Abbey Lindsey
Proud of you! Smash it!
$35
Adam Feinberg
$33
Babe
Love you babe! So proud of you xoxoxo
$30
Claire Abery
Love you Dobdob
$28
Daniel Thomson
$28
Dan Moss
Great cause!
$25
Lucy Hanigan
💛💛💛
$25
Brooke Thompson
Gooooooo Cazzie!!!
$23
Anonymous
Love you
$23
Matt Soulos
$23
Travis Whykes
Go Dobbo
$23
Shelley
You have always been an inspiration
$23
Anonymous
$23
Cilla Dobson
You're an amazing human Mark.... keep up the great work ❤️
$23
Sam P
$23
Lorraine Teychenne
$23
Kristy Z
Go Cazzy xx
$23
Lochie Mcfarland
$23
Deb Jones
$20
Rita
Goodluck darling!! You got this 👊
$20
Harper Stanier
$20
Mason Down (natalie’s Son)
Go team you can do great looking forward to meeting you all
$17
Grace
$15
Mason Down
$12
Emily M
$12
Emily M
$12
Oliver Smith
Fantastic work! Great cause!
$12
Tom Down
Can’t wait to climb the mountain with you all on Friday.. from Tom.. 🎉
$11
Leila K
$10
Eloise Smith
$7
Anonymous
Our Team Members
Masaaki Kotaki
$597
Kristina Turner
$2,306
Meaghan Clarke
$1,628
Laurent Pangon
$54
Natalie Down
$838
Mark Dobson
$1,146
Sarah Clisdell
$504
Malcolm Down
$1,687
Carolyn McFarland
$542
Matt McFarland
$172
Amazing job Mark!