Dennis O'Brien

I am riding 250 miles to help beat cancer, especially cancer in children. Please sponsor me and support the effort to fight kids' cancer and save little lives.

Donate Now

I've Ridden 168.6 mi My goal is 250 mi

My Rankings

National: 1604th
State: 104th in IL

I've raised $862 to fight kids' cancer Donate Now

My Story

17 Jun 2026

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

Why? Because right now, cancer is the biggest killer of children from disease in the United States. Over 15,700 children are diagnosed every year, and sadly, 38 children die of cancer every week.

Kids should be living life, not fighting for it.

So I am raising funds through my challenge to help these kids and support Children's Cancer Research Fund to allow them to continue their work to develop lifesaving treatments and find a cure for childhood cancer. I and other members of my family and extended family have battled cancer and won. But more research is needed to help save more lives.

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 8 years to fight kids' cancer and save little lives.

233 mi Ridden

$1,000 Raised

2019
150 mi Ridden

$798 Raised

2020
210 mi Ridden

$1,510 Raised

2021
178 mi Ridden

$1,003 Raised

2022
302 mi Ridden

$1,067 Raised

2023
272 mi Ridden

$1,564 Raised

2024
269 mi Ridden

$1,460 Raised

2025
169 mi Ridden

$862 Raised

2026

1,783 mi

Ridden

$9,265

Raised

My Challenge

20.8 mi ride - Lunch Ride - Thursday, September 10, 2026

Logged this ride 3 days ago - View on Strava
$500 raised to fight kids' cancer!

I just raised $500 to fight kids' cancer and achieved GUARDIAN LEVEL in the challenge! Thank you so much for your support.

Posted 4 days ago
$250 raised to fight kids' cancer!

I just raised $250 to fight kids' cancer and achieved PROTECTOR LEVEL in the challenge! Thank you so much for your support.

Posted 5 days ago
67.3 mi ride - Morning Ride - Monday, September 7, 2026

Logged this ride 6 days ago - View on Strava
30.6 mi ride - Morning Ride - Sunday, September 6, 2026

Logged this ride 8 days ago - View on Strava
26.7 mi ride - Morning Ride - Saturday, September 5, 2026

Logged this ride 8 days ago - View on Strava
23.2 mi ride - Afternoon Ride - Wednesday, September 2, 2026

Logged this ride 11 days ago - View on Strava
$100 raised to fight kids' cancer!

I just raised $100 to fight kids' cancer and achieved DEFENDER LEVEL in the challenge! Thank you so much for your support.

Posted 69 days ago

My Sponsors

Kick Cancer's Butt Day matched donation

“Here's your matched donation from a group of wonderful Children's Cancer Research Fund supporters. THANK YOU so much for your awesome efforts to kick cancer's butt!”
$296.59
Received this donation 4 days ago

Dennis
Anonymous
$103.50
Received this donation 4 days ago

Dennis
Anonymous

“Go Dennis! Thank you for your dedication to fighting cancer!”
$51.75
Received this donation 46 days ago

Dennis

“Thank you for your contribution for children's cancer research!”

Thank you for your contribution for children's cancer research!
Joe and Fawn Campos

“Keep riding!”
$51.75
Received this donation 4 days ago

Dennis

“Dawn and Joe, thank you for your support. Research is the hope for the present and for the future.”

Dawn and Joe, thank you for your support. Research is the hope for the present and for the future.
Roger Finnell

“Keep on pedaling Dennis!”
$51.75
Received this donation 11 days ago

Dennis

“Thank you, Roger. You and I are beneficiaries of prior research, so it is important we continue the effort.”

Thank you, Roger. You and I are beneficiaries of prior research, so it is important we continue the effort.
Aidan & Michelle Gilbert

“Keep pedaling.”
$37.26
Received this donation 4 days ago

Dennis

“Thank you both. With yesterday’s match I have met my goal, but I will be adding more miles, and hopefully more funding for research.”

Thank you both. With yesterday’s match I have met my goal, but I will be adding more miles, and hopefully more funding for research.
Sean OBrien
$36.23
Received this donation 5 days ago

Dennis

“Thank you, Sean. With your help I’ve met my goal, and will hopefully exceed it even more. I’m about to hop on the bike to work on my mileage goal.”

Thank you, Sean. With your help I’ve met my goal, and will hopefully exceed it even more. I’m about to hop on the bike to work on my mileage goal.
Kate Mack

“Proud of you Dad!”
$25.88
Received this donation 5 days ago

Dennis

“No, thank you, Kate, for your helping to find treatments and cures for children.”

No, thank you, Kate, for your helping to find treatments and cures for children.
Dennis O'Brien

“Starting this ninth year off with my own contribution, to honor those who have fault the battle, or have helped others fight the battle, and to promote research to reduce or eliminate the need for the battle itself.”
$103.50
Received this donation 69 days ago

Dennis
Anonymous
$103.50
Received this donation 5 days ago

Dennis