Half Marathon

The Estes Park Marathon is America’s most scenic marathon course! In the marathon, runners enjoy our famous road course that is surrounded by glorious 360 degree views of Rocky Mountain National Park. Starting with an inspiring 1500 ft…

Marathon, Half Marathon, 10k, 5k and 3-Person Marathon Relay.  Marathon, Marathon Relay and Half Marathon runners get to run down the scenic, downhill Poudre Canyon to the finish in Old Town, Fort Collins, where we have live music and a big…

Denver's oldest half marathon runs along the Platte River Trail, covering parts of Littleton and Denver.

The first Canyonlands Half Marathon was run on May 1, 1976 had just 22 finishers, including a dog. Today, thousands of runners come together in March to enjoy the scenic red rock formations and winding Colorado River that Moab has…

Arches Ultra travels along the border of Arches National Park, using Bar M, Klonzo, and Klondike Trail Systems.  The trails are smooth and easy at points, technical slick rock at others, and there’s even some sand to shake things up.…

Run alongside the roaring Elk River through the emerald green pastures on Country Road 129 with the snow-capped Rocky Mountains of Colorado all around and find out why the Steamboat Marathon was ranked as one of the “Top 10 Destination…

Because a girls weekend should include an exciting challenge, we present Thelma and Louise Marathon Half Marathon and 15K! There is also a marathon and 50K option!  Bring your best girl friends to Moab and experience remoteness of Moab's…

The Slacker races are always held on the 4th Saturday in June, and in 2025, that means Saturday, June 28th! We’re excited to announce a new change for next year:  wave starts will be enhanced to help ensure a smoother race start. Be sure…

The Blue Heron Half Marathon and 5K courses are flat and fast, along the S Platte River. Along the way you will enjoy wildlife, placid waters, and scenic views. Join the Rocky Mountain Road Runners on April 24th at the Adams County Regional…