COVID-19 NOTICE: The State of Michigan is currently restricting the number of people indoors to 25 and outdoors to 300, which would make it impossible for us to hold the event. Thornapple Kellogg Schools are not allowing any organizations to use their facilities at this time, and it would be impossible for us to find a suitable facility for holding the National 24 Hour Challenge in the Middleville area. Though the event is currently scheduled for August 7-8, we will continue to monitor the situation.
REFUND POLICY: If we are forced to reschedule or cancel the event this year, we will contact everyone who has registered and you will have the option of rolling over your registration until next year or receiving a full refund. Thank you for your understanding as we work through these challenges to make the crucial decisions that will result in a safe event for everyone – riders, crews, volunteers, and spectators.
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!)
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
2019
2018
2017
2016
2015
2014
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.
