Due to the increased risk of becoming infected with the Delta variant or spreading it to others, the Board of Directors of the National 24 Hour Challenge joins the CDC in recommending that riders, volunteers, crew members, and the general public wear a mask when inside Thornapple-Kellogg Middle School or Delton Kellogg High School.
Registration is Open - Sign Up Now!
Exciting improvements; same great N24HC!
We’ve made a few changes – including non-stop checkpoints and a single daytime loop with closer checkpoints and better facilities! And a better Sunday breakfast!
The 2020 National 24 Hour Challenge has been selected as the World Ultra Cycling Association’s 2020 North American 24-Hour Championship event for both the Women’s and Men’s divisions! We are honored to once again be unanimously selected by the board of the WUCA as their North American 24-Hour Championship event, having served as the championship event most recently in 2017.
If you would like to be eligible for the 2020 North American 24-Hour Championship, you must be a member of the WUCA. To become a WUCA member, go here. (And then come back here!)
August 7-8, 2021
WHY WOULD A BICYCLIST TRY TO RIDE FOR 24 HOURS?
Beginning bicyclists find a ten-mile bicycle ride is just about right. Then ten miles builds to 20… or 50…
Once you’ve done a century, you might try a double. And your next step might be to see how far you can go in a day. Not everyone can complete in the Olympics, but anyone can set a goal and try to achieve it. The N24HC is the place for you to amaze your friends, families, and most of all, yourself!
Thank you, riders, crews, & especially volunteers!
It was another great event - see you next year!
Searchable results and photo galleries will be coming in the next few days. In the meantime, check out this year’s results over at 24hr.bike
THE CHALLENGE
The ride begins and ends at 8 am. How far will you go?
NEW RIDERS
Every journey starts with a first step. Your journey starts now.
RETURNING RIDERS
You’ve been here before and can’t wait for June!
GALLERIES
2021
2019
2018
2017
2016
2015
News and Announcements
OUR SPONSORS
COMMUNITY SUPPORTERS
“I NEVER KNEW WHAT I COULD NOT DO; THEREFORE, I WAS WILLING TO TRY ANYTHING”
This year, explore your limits at the National 24-Hour Challenge – the oldest and largest ultramarathon cycling event in the nation. Come to beautiful West Michigan and test yourself in the company of 400 riders. The N24HC is your opportunity to find out what you can do.
