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   June 19-20, 2015 

Middleville, Michigan 

A personal best, on-road bicycle ride - to test endurance and determination.

The National 24 Hour Challenge
has been held every Father's Day Weekend since 1983. 

Riders have come from most every state,
as well as more than a dozen foreign countries.

Set your goal, Join us, and achieve it!

The N24HC is a UMCA Ultracycling Cup Event

Recent Announcements

  • 2015 Taillight Rules Because of the configuratiuon of our night loop, a single blinking taillight could become  a hazard.We require at least one constant-burning taillight, affixed to the bicycle.An additional ...
    Posted Nov 2, 2014, 3:43 PM by Pete Steve
  • Rapid Wheelmen Training Rides Our friends in the Rapid Wheelmen bike club arrange a series of spring rides ideally suited for N24HC training.May 3, 2014:  Dawn Patrol Special Edition - Dawn Patrol is a ...
    Posted Mar 21, 2014, 8:45 AM by Pete Steve
  • New Sponsors - Welcome Aboard! We're pleased to announce a couple of new sponsors: Gap30 Bicycles in Wyoming and Holiday Inn Express in Hastings.Both are newly established businesses and we wish them great ...
    Posted Mar 7, 2014, 8:53 PM by Pete Steve
  • Proposed Change in Place Calculation N24HC Riders: The N24HC is contemplating a change to how places are assigned that will bring us more into line with the rest of the sporting world. In a short ...
    Posted Jan 8, 2014, 2:16 PM by Pete Steve
  • Untitled
    Posted Nov 17, 2014, 8:08 PM by Pete Steve
Showing posts 1 - 5 of 9. View more »