Gnar Runners

Horsetooth RockGnar Runners events are designed to promote enthusiasm and passion for the sport of mountain, trail and ultrarunning in and around the beautiful mountains of Northern Colorado. 

Whether you are leading the charge at the front of the field, playing host in the middle of the pack or chasing course cut-offs, our dirt-based races are geared towards helping you achieve your off-road running goals in stunning outdoor environments.

While we seek to create challenging courses on as much gnar-filled terrain as we can reasonably find, we also guarantee impeccably marked courses, bountiful aid stations and a post-race atmosphere to remember.

Be gnarful out there!

Recent Posts

Gnar Runners 2018 UTMB Qualifying Races

UTMB Ultra-Trail du Mont-Blanc Qualifying RaceWe are proud to announce that Quad Rock, Never Summer, and the Blue Sky Marathon are now Ultra-Trail du Mont-BlancĀ® qualifying races.

Registration is now open for all Gnar Runners 2018 trail races. Sign up for the full Gnar Slam and earn 10 UTMB points!

A lone runner descends from North Diamond Peak on the way to Montgomery Pass on the Never Summer 100K course.

The view of Longs Peak from the Quad Rock 50 course.

Technical rocky trail at Devil’s Backbone on the Blue Sky Trail Marathon course.

  1. Train for Quad Rock with the Gnar Runners Team Leave a reply
  2. 2018 Gnar Race Registrations to Open Dec 15 Leave a reply
  3. 2017 Blue Sky Trail Marathon Race Recap 5 Replies
  4. 2017 Blue Sky Marathon Pre-Race Details Leave a reply
  5. A Roundup from the 5th Running of the Black Squirrel Trail Half Marathon Leave a reply