Niwot’s Challenge Sedalia, CO   May 10, 2025

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.

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.

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.

THIS IS GRADUATE LEVEL, think doctoral dissertation, and participants are expected to have considerable ultra or adventure racing experience that proves their ability to take on this challenge safely. This is not an event where one runs. This is an event where one slowly suffers until they either finish, or find their way back to the CP.

No more than 40 runners will be selected to run in this event (Strict)

Entry Fee: Donation Based – Not Required

All runners will be known on race weekend by their Spirit/Totem Animal. Only those who finish the Niwot’s Challenge will be given a suitable Chief name differentiating them from all other comers. Those who complete the Niwot’s Double will reach Deity level.

Information pertaining to the challenge will be issued, electronically, to runners during the week leading up to the event. This information includes a course map, aid station location, aid and crew access point(s), additional rules, and start time of the event. This will provide runners with ample time to assemble their course maps and other needs for the event.