12 Hour

See if you can get to the 11th hour: one 4.167-mile loop, every hour, for as long as you can, up to 11 laps before the park closes for the […]

Introducing the Raising the Barr Ultra Race. Try to finish as many 10 mile loops around the lake in the first 4 or 10 hours and then switch to 1 […]

This is a true last-man-standing event, and it will go until there is only one runner left, no matter how long it takes. Unlike all other competition race formats, this […]

Welcome to Front Range Ultra Dayze! 100 hours of ultra-running madness! Our goal is to bring people from all over the U.S. together for a festival of ultra-running in Loveland, […]

The MOCO Trails Wild West Backyard Ultra is a community-driven endurance event held at beautiful Loudy Simpson Park in Craig, Colorado along the banks of the Yampa River. This race […]

Come out and enjoy a unique running experience at the beautiful Luvin Arms Animal Sanctuary with live music, food, and fun! Flat & fast off-road cross country style course with […]

A Backyard Ultra is also known as a Last Person Standing Race, but don’t let this deter you from joining the fun! Complete 4.17 miles of dirt road and single […]

A Backyard Ultra. Complete an easy 4.167 mile course. If you finish in less than an hour—just a 14:24 pace per mile—you get to do it again at the top […]

The Up For Air Series is a collection of endurance events created to support improved air quality, while having fun hiking and running on great trails with good people.  Proceeds […]

Looking for an epic way to kick off the year? Join a single 5K race or see how many 5K loops you can complete in the 12-hour challenge! There will […]