Niwot’s Challenge is a very difficult, grass-roots, ultramarathon in Colorado’s Front Range. It is modeled after the arduous Barkley Marathons in Tennessee and the historic More and More Difficult 50K in New Hampshire. Much of the information for this event is kept secret until event week. This is done for a variety of reasons pertaining to the safety of the events participants and for the preservation of the event. If you want to know more.. you’ll just have to sign up.

When?
April 9, 2022

Where?
Can’t tell ya.. unless you sign up.
We’ll just tell ya it’ll be unforgiving terrain in the Front Range West of Denver.

THE COURSE

Runners will travel on dirt roads, trails, and via bushwhack/off-trail. Successful completion of the course will be achieved when a runner has travelled the course, identically to how it’s been laid out, and retrieves a page from each of the books hidden on the course.

Registration