Niwot's Challenge

MAY
1
2027
Invitation-only Colorado endurance event on May 1, 2027 with a 40-person field, unpublished course, heavy off-trail navigation, minimal aid, and mandatory map and compass skills.
Sat 1 May 2027
100 miles 50 miles 24 miles

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Niwot's Challenge

Niwot's Challenge is an invitation-only, non-competitive endurance event held along the South Platte River in Sedalia, CO. The 14th annual edition is scheduled for May 1, 2027, with a field capacity of 40 participants. The event presents an unpublished course that emphasizes off-trail navigation, limited aid, and self-reliance.

The format requires participants to visit designated Sacred Waypoints and retrieve unique codes to validate completion. Organizers prohibit GPS use on course; map and compass navigation or following a registered navigator is required. Phones are allowed for emergency use only. Entry is free; donations are encouraged.

Applications are accepted during a defined window in January 2027. Selection follows a specific order of priority that includes immediate acceptance for the first five applicants, allocations for returning participants and first-time applicants, and a set of wild cards. Applicants are notified after the field is selected.

Three main route options are described by distance and elevation:

  • Burn Loop: ~24 miles, +10,000' / -10,000', 16 hour limit
  • Chief's (two loops): ~50 miles, +20,400' / -20,400', 30 hour limit
  • Deity (four loops): ~100 miles, +40,800' / -40,800', 60 hour limit

Mandatory gear includes a printed course map, whistle, emergency blanket or bivy, headlamp or flashlight, at least 2 liters of liquids, a light jacket, and sufficient calories for 12 hours. The event maintains an online community hub for official updates and participant communication. Visit the organization's website for the most recent information.

Events nearby

A six hour timed loop event at Sandstone Ranch Open Space in Larkspur CO with 8 mile loops, aid every four miles and finisher medals.
Mountain trail race at Staunton State Park offering 50k, 16 mile and 8 mile courses, time limits, shuttle parking and variable December weather.
A winter out and back 21.6 mile race near Sedalia CO with 2,627 ft of climbing, mandatory gear, aid stations, and a 200 runner field limit.
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