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

Blue Sky Marathon & Black Squirrel Half Training

Need some motivation to train for the Blue Sky Marathon or Black Squirrel Half Marathon?

Click here for a 15 week training program for the marathon and a 9 week training program for the half marathon. 

We will be hosting a series of Tuesday evening training runs at Lory State Park starting August 7th. Stay tuned for more info.

Sign up for the Blue Sky Marathon by 6/30 to take advantage of our $65 early registration deal!

  1. Volunteers Needed for the Never Summer 100K Leave a reply
  2. Never Summer 100K Training Weekend Leave a reply
  3. A Muddy Quad Rock 2018 – Post Race Wrap 2 Replies
  4. 2018 Quad Rock Competition Preview Leave a reply
  5. Quad Rock 2018 Pre-Race Information Leave a reply