John 'Zac' Brennan

6years All Star
John 'Zac' Brennan
I am riding 200 mi for Kahleesi. Please sponsor me and support my challenge to fight kids' cancer and save little lives.
I've Ridden 0.0 mi ? My goal is 200 mi
My Rankings
  • National: 127th
  • State: 3rd in CO
I've raised $1,119 My goal is $1,500 Donate Now

I'm Riding For

Kahleesi

Kahleesi

Kahleesi ride your cool bike! Have fun❤️

My Story

3 Aug 2025

This September 2025 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.

Please support me by making a donation to give these kids the brighter futures they deserve. I'm also riding for myself. In Vietnam in the Army I was exposed to Agent Orange herbicide and now at 75, have Stage IV metastatic prostate cancer.

Your support will change little lives.....and mine too!

Thank you.

John Zac Brennan

My Legacy

Here's my personal impact over 6 years to fight kids' cancer and save little lives.
  • 514 mi Ridden
    $2,077 Raised
    2020
  • 465 mi Ridden
    $1,695 Raised
    2021
  • 519 mi Ridden
    $2,266 Raised
    2022
  • 546 mi Ridden
    $6,000 Raised
    2023
  • 565 mi Ridden
    $4,500 Raised
    2024
  • Ridden
    $1,119 Raised
    2025
6years
2,610 mi
Ridden
$17,657
Raised

My Challenge

  • $1,000 raised to fight kids' cancer!

    I just raised $1,000 to fight kids' cancer and achieved WARRIOR LEVEL in the challenge! Thank you so much for your support.

    Posted 18 hours ago
  • $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 9 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 16 days ago
  • $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 16 days ago

My Sponsors

  • Dennis and Kathy Dougherty
    “" You the Man" May all your hills be "down-hill" XOXO”
    $155.25
    Received this donation 18 hours ago
    John 'Zac' Brennan
    John
    “Thank you Dennis. The kids appreciate your support.☮️😎”
  • Anne Krallman
    “Zac , I am so PROUD of you !!!”
    $124.20
    Received this donation 4 days ago
    John 'Zac' Brennan
    John
    “Thank you Anne for your generous support !”
  • Mike Ruzicka
    “Thanks for doing all you can to help in the battle. Hope to see you at next week’s meeting.”
    $103.50
    Received this donation 3 days ago
    John 'Zac' Brennan
    John
    “Thank you Mike for your help! Kids with cancer deserve healthy lives. They should be riding their own bikes!☮️”
  • Patricia O’Leary
    “Way to go, Little Dear! Another year riding for a great cause! ♥️”
    $103.50
    Received this donation 16 days ago
    John 'Zac' Brennan
    John
    “Thank you Little Dear❤️”
  • Mitch Godfrey
    “Great to see a fellow Vietnam Veteran ride 200 miles!”
    $100
    Received this donation 2 days ago
    John 'Zac' Brennan
    John
    “Thank you Mitch! Welcome home!!”
  • Greg Krallman
    “Those who help others while facing their own challenges… now that’s LOVE Go gettem Zac”
    $72.45
    Received this donation 16 days ago
    John 'Zac' Brennan
    John
    “Thanks Greg! Are you home yet?”
  • Jen Havely
    “Happy to support this great cause! Wishing you all the best on your challenge!”
    $72.45
    Received this donation 3 days ago
    John 'Zac' Brennan
    John
    “Thank you, Jen for your support. The research needs to be done. It looks like it’s up to us to support the researchers. The government has backed out of it. Thank you again.”
  • Facebook Fundraiser Donation
    $56.62
    Received this donation 10 days ago
    John 'Zac' Brennan
    John
    “Thank you for your help!!”
  • Anonymous
    “We will need all the help we can get to fight cancer with RFK in there tRump! Good luck!! Kick some ass!!”
    $51.75
    Received this donation 6 hours ago
    John 'Zac' Brennan
    John
    “Thank you Alison (or anonymous). The kids need our help. Uncle Jack Zac”
  • Facebook Fundraiser Donation
    $51.52
    Received this donation 12 days ago
    John 'Zac' Brennan
    John
    “Thank you for your support. John Zac Brennan”
  • Facebook Fundraiser Donation
    $50
    Received this donation 10 days ago
  • Facebook Fundraiser Donation
    $45
    Received this donation 12 days ago
    John 'Zac' Brennan
    John
    “Thank you so much. Zac Brennan”
  • Facebook Fundraiser Donation
    $40
    Received this donation 9 days ago
  • Susan Teuton
    “Way to go Zac!!”
    $36.23
    Received this donation 23 days ago
    John 'Zac' Brennan
    John
    “Thank you Susan ❤️”
  • Facebook Fundraiser Donation
    $5
    Received this donation 12 days ago
    John 'Zac' Brennan
    John
    “Thank you for your support. Zac Brennan”
  • John 'Zac' Brennan
    “I’ve decided to ride for the Children’s Cancer Research Fund again this September. And so the first donation is from me.”
    $51.75
    Received this donation 26 days ago
Donate Now