Katherine Macmillan

I am riding 570 km in memory of Julia. Please sponsor me and support my challenge to fight kids' cancer and save little lives.

Donate Now

I've Ridden 691.4 km to fight kids' cancer

My Rankings

National: 40th
Province: 19th in ON
My Team: 1st

I've raised $9,595 to fight kids' cancer Donate Now

I'm Riding For

Julia

My Story

10 Jun 2025

This August, I am again taking part in the Great Cycle Challenge to fight kids' cancer!

Why? Because right now, over 1,700 children are diagnosed with cancer every year, and it's the biggest killer of children from disease in Canada.

Kids should be living life, not fighting for it.

So I am raising funds through my challenge to help these kids and support SickKids Foundation to allow them to continue their work in developing treatments and finding a cure for childhood cancer.

Please support me by making a donation to give these kids the brighter futures they deserve.

Your support will change little lives.

Thank you.

My Legacy

Here's my personal impact over 2 years to fight kids' cancer and save little lives.

569 km Ridden

$8,435 Raised

2024
691 km Ridden

$9,595 Raised

2025

1,261 km

Ridden

$18,030

Raised

My Challenge

Riding in the rain 🌬️🚴🏻‍♀️🚴🏻‍♂️💦

20 Aug 2025

Families with kids fighting cancer don’t get to “choose” good, sunny weather days … so Mika and I rode today despite Mother Nature insisting on keeping us wet & cold. Had we just waited 24 hours … ⛅️🙃🤷🏼‍♀️🤦🏼‍♀️ Glad we showed our true grit and determination. Thank you all for your help and support! I’m almost at 400kms … tomorrow 💪🏻🚴🏻‍♀️🤞🏻

Posted 117 days ago
Michael Garron - an inspiration

13 Aug 2025

Today is Kick Cancer’s Butt day for the Great Cycle Challenge. Each donation today will be matched up to $1,300,000 by the very generous Garron Family. Sick Kids and their fight against childhood cancers is very near and dear to the Garron family.

Michael Garron died at the age of 13 in 1975 of a rare form of cancer. Before he died, he told his mother that he was afraid he would be forgotten. “As long as I'm alive, no way will you ever be forgotten,” she replied. So on August 13th let’s all remember a remarkable little warrior. Thank you Garron family for everything you do to help healthcare 🙏🏻🙏🏻

Posted 124 days ago
Riding with Mika 🚴🏻‍♀️🚴🏻

5 Aug 2025

Mika is my 11 year old neighbour who, when he heard about the GCC to help Sick Kids Hospital beat children's cancers, jumped in with both feet! "There are many people in my life that have had cancer, such as my mom, my grandma, and some of my friends. One of my best friends uncle just passed from cancer, and I want to raise money to find a cure." Wow, what a profound and powerful statement of commitment from a young man. I am honoured that the GCC has given me the opportunity to ride with my new young friend Mika. He is outstanding. I look forward to more rides with Mika.

Here is Mika's link if you would like to support his wonderful quest:

https://greatcyclechallenge.ca/Riders/MikaSabet

Posted 131 days ago
DAY 1 LET’S GO! Time to fight kids cancers. 👊🏻

1 Aug 2025

On one hand today is day 1 of the Great Cycle Challenge but it is another tough day for the families with a loved one fighting cancer. Today, during my first ride, I thought about how very important it is for so many that together we help fund Sick Kids fight against cancer. I’m riding for my niece wee baby Julia, I’m riding for my Dad, I’m riding for friends. THANK YOU for helping me and Sick Kids kick cancers butt. LET’S GO!

Posted 136 days ago
New year, same challenge. Let’s fight kids cancers!

23 Mar 2025

Although there is still snow on the ground, it’s time to start thinking about the Great Cycle Challenge and riding for Sick Kids! This year I have a secret goal to surpass 500kms … if the weather cooperates I’d like to pedal 10 kms for each year I’ve been blessed to celebrate on this beautiful planet. Time to start training!

Posted 267 days ago

My Sponsors

Chris & Lyle

“Keep up the great work!!!”
$1,035
Received this donation 194 days ago

Katherine

“THANK YOU❣️❣️ ❤️👼🏻❤️ 🚴🏻‍♀️”

THANK YOU❣️❣️ ❤️👼🏻❤️ 🚴🏻‍♀️
Kick Cancer's Butt Day matched donation

“Here's your matched donation made possible by the generosity of long-time SickKids Foundation supporters, the Garron family. THANK YOU so much for your awesome efforts to kick cancer's butt!”
$993.96
Received this donation 123 days ago

Katherine
Mike Harrower
$517.50
Received this donation 124 days ago

Katherine

“Thank you so very much Mike❣️ A wonderful way to continue to help Sick Kids, especially on Garron family matching day. Thx my friend 🤗🚴🏻‍♀️”

Thank you so very much Mike❣️ A wonderful way to continue to help Sick Kids, especially on Garron family matching day. Thx my friend 🤗🚴🏻‍♀️
Jane Jackson

“Good going, you! Especially in this heat and humidity.”
$397.31
Received this donation 123 days ago

Katherine

“Thank you so very much for your generous donation Jane❣️ It's a very important cause and together we are fighting to help beat cancer for kids of all ages. Your support and encouragement is greatly appreciated. 🤗🚴🏻‍♀️”

Thank you so very much for your generous donation Jane❣️ It's a very important cause and together we are fighting to help beat cancer for kids of all ages. Your support and encouragement is greatly appreciated. 🤗🚴🏻‍♀️
Brad Pavelka
$310.50
Received this donation 172 days ago

Katherine

“Thank you Brad❣️ 🚴🏻‍♀️🚴🏻‍♀️🚴🏻‍♀️🚴🏻‍♀️🚴🏻‍♀️”

Thank you Brad❣️ 🚴🏻‍♀️🚴🏻‍♀️🚴🏻‍♀️🚴🏻‍♀️🚴🏻‍♀️
Chelle & John Tiedmann

“Go Kiwi!”
$310.50
Received this donation 131 days ago

Katherine

“Thank you so much Chelle & John❣️❣️ Riding in Julia’s honour to help fight kids cancers is so very important to me. Thx❣️Love you! Kiwi 🤗”

Thank you so much Chelle & John❣️❣️ Riding in Julia’s honour to help fight kids cancers is so very important to me. Thx❣️Love you! Kiwi 🤗
Karen Macmillan
$310.50
Received this donation 218 days ago

Katherine

“THANK YOU Karen❣️❣️❣️🚴🏻‍♀️”

THANK YOU Karen❣️❣️❣️🚴🏻‍♀️
Harri Jansson

“Happy to support a good friend doing good”
$274.28
Received this donation 160 days ago

Katherine

“THANK YOU Harri❣️ Hope you are doing well and are using your e-bike. I’ll keep you updated on my riding progress this August! Sure wish you were still in Ontario. Take care 🤗”

THANK YOU Harri❣️ Hope you are doing well and are using your e-bike. I’ll keep you updated on my riding progress this August! Sure wish you were still in Ontario. Take care 🤗
Anonymous
$222.53
Received this donation 112 days ago

Katherine

“Thank you very much for your generous support❣️ Together we are helping Sick Kids to fight cancer for kids of ages 💪🏻 🤗🚴🏻‍♀️”

Thank you very much for your generous support❣️ Together we are helping Sick Kids to fight cancer for kids of ages 💪🏻 🤗🚴🏻‍♀️
Cathy Cranston
$207
Received this donation 110 days ago

Katherine

“Many thanks Cathy for your generous support❣️We are into the final push and you have sure helped Sick Kids & me. Together we are fighting cancers for kids of ages. 👊🏻🚴🏻‍♀️❤️”

Many thanks Cathy for your generous support❣️We are into the final push and you have sure helped Sick Kids & me. Together we are fighting cancers for kids of ages. 👊🏻🚴🏻‍♀️❤️
John Milkeraitis
$207
Received this donation 114 days ago

Katherine

“Thank you so very much John & Peggy❣️ Together we are helping Sick Kids fight cancer for kids of all ages 🤗 Your support for everything I do is very greatly appreciated ❤️”

Thank you so very much John & Peggy❣️ Together we are helping Sick Kids fight cancer for kids of all ages 🤗 Your support for everything I do is very greatly appreciated ❤️
Mary Hirst

“…such a great cause! Go Kathie go!”
$207
Received this donation 131 days ago

Katherine

“Thanks Mary❣️❣️❣️ This is an important cause for me and your support means a ton. Thank you 🤗 Together we are fighting kids cancers!!”

Thanks Mary❣️❣️❣️ This is an important cause for me and your support means a ton. Thank you 🤗 Together we are fighting kids cancers!!
Stephanie Baldry

“Kathie - inspiring to follow your journey !! Thank you for your dedication to the fight against cancer !!”
$207
Received this donation 107 days ago

Katherine

“Thank you so very much Steph❣️ Your words of encouragement and your generous support mean the world to me 🤗🥰 Together we are helping Sick Kids with their fight against cancers for kids of all ages. 👊🏻🚴🏻‍♀️”

Thank you so very much Steph❣️ Your words of encouragement and your generous support mean the world to me 🤗🥰 Together we are helping Sick Kids with their fight against cancers for kids of all ages. 👊🏻🚴🏻‍♀️
Rosemary Johnston

“Way to go Kathie! Sick Kids Hospital holds a very special place in my heart. Thank you for helping them.”
$200
Received this donation 116 days ago

Katherine

“Thank you Rosemary❣️🚴🏻‍♀️ Together we are helping Sick Kids fight cancer for kids of all ages! 🤗💪🏻🚴🏻‍♀️”

Thank you Rosemary❣️🚴🏻‍♀️ Together we are helping Sick Kids fight cancer for kids of all ages! 🤗💪🏻🚴🏻‍♀️
Gayle Gorman

“Ride KMac Ride!!!! We’ll be watching your progress!! Hugs, G&B”
$155.25
Received this donation 129 days ago

Katherine

“Thank you so very much Ben & GG❣️❣️ I’ll be trying to max my mileage this weekend as next week I’ll be in Montreal helping my niece & her family but Fionn and I will get some rides together. He’s an adorable 7 1/2 yo 🥰 🚴🏻‍♀️🚴🏻‍♂️ This is such an important cause, thank you for ALL your support 🤗🥰😘”

Thank you so very much Ben & GG❣️❣️ I’ll be trying to max my mileage this weekend as next week I’ll be in Montreal helping my niece & her family but Fionn and I will get some rides together. He’s an adorable 7 1/2 yo 🥰 🚴🏻‍♀️🚴🏻‍♂️ This is such an important cause, thank you for ALL your support 🤗🥰😘
Allie Costin

“💕”
$124.20
Received this donation 105 days ago

Katherine

“Thank you very much Allie, Christopher, Audrey & Elle ❤️❤️❤️❤️ Together we’re helping so many others 🤗”

Thank you very much Allie, Christopher, Audrey & Elle ❤️❤️❤️❤️ Together we’re helping so many others 🤗
Jane Thompson

“Good work Kathie ! Go Girl Go”
$124.20
Received this donation 122 days ago

Katherine

“Thank you so very much Jane❣️❣️❣️Together we are helping Sick Kids fight cancer for kids of all ages. Your support means so very much Jane 🤗”

Thank you so very much Jane❣️❣️❣️Together we are helping Sick Kids fight cancer for kids of all ages. Your support means so very much Jane 🤗
Karen Rechnitzer

“You will make it!!”
$124.20
Received this donation 124 days ago

Katherine

“Thanks Karen❣️🚴🏻‍♀️ Your support is so appreciated and important to help end kids cancers. 🤗”

Thanks Karen❣️🚴🏻‍♀️ Your support is so appreciated and important to help end kids cancers. 🤗
Kat & Travis
$124.20
Received this donation 107 days ago

Katherine

“THANK YOU so very much Kat & Travis❣️Sick Kids does such amazing work, cancer research is especially important now. Thank you for helping kick cancers butt 🤗🤗❤️❤️”

THANK YOU so very much Kat & Travis❣️Sick Kids does such amazing work, cancer research is especially important now. Thank you for helping kick cancers butt 🤗🤗❤️❤️
Kathie

“Kicking off my campaign to help fight kids cancers. Cancer is far too prevalent. It took my Dad in 1981 and my niece, little baby Julia in 1990. Let's all fight to beat cancer and especially kids cancers!!”
$124.20
Received this donation 266 days ago

Katherine