Ned Ned Run Half Marathon, 10k, & 5k

Saturday, September 9, 2023 Nederland, CO

Ned Ned Run Half Marathon, 10k, & 5k course in Nederland, CO

As part of the Colorado Mountain Half Marathon Series, the Ned Ned Run Half Marathon, 10k, and 5k is entering its 41st year, making for a long-lasting tradition that celebrates family, community, and most of all, the beauty of the Colorado mountains. 

Trail Runners, Scenic Views, Challenging Course. Comprising dirt roads and technical trails throughout beautiful national forests, the Ned Ned Run Half Marathon course offers participants an opportunity to run with the awe-inspiring Barker Reservoir as the backdrop. 

Winding through Old Town Nederland, Colorado, this event is just west of Boulder and just east of Indian Peaks Wilderness, making for an incredible weekend outing for the entire family to enjoy. 

At an elevation of 8234 feet, this race will begin at 151 East Street, with both the start and finish line located at TEENS, Inc. Headquarters. Noted as one of the most challenging half marathon courses on the front range, this course kicks runners off along the winding roads of Old Town Nederland for a mile before climbing up Sugar Mag Trail. 

Along the single track, runners will persist for another ¾ mile before reaching the first aid station at mile 5.5. From there, it’s time to hit the West Magnolia Trails before crossing Highway 119 onto East Magnolia Road.

Finally, it’s the last descent of the course before reaching the finish line. 

Upon registration, all participants will receive a racing bib and custom t-shirt, with pick-up of the swag taking place the night before the race. 

While family-friendly and community-based in many aspects, this course remains competitive, with no walkers allowed to participate due to the challenging nature of the course and the single-track course design. 

Finally, as a cupless event, all runners are encouraged to bring their own hydration flasks, whether a reusable bottle or a bladder bag. 

Race Weather & Climate

Nederland, Colorado, is a charming mountain town located in the scenic foothills of the Rocky Mountains, approximately 17 miles west of Boulder, known for its artistic community and outdoor adventures.

September 9 in Nederland, Colorado marks the early days of autumn. High temperatures typically reach around 67°F, providing a mild and comfortable atmosphere for outdoor activities. As the day turns into night, temperatures cool down to approximately 39°F. Precipitation levels are generally low, with an average of just 0.7 inches, making it an excellent day to enjoy the changing colors of fall and the scenic beauty of Nederland.

Ned Ned Run Half Marathon, 10k, & 5k Race Results

Ned Ned Run Half Marathon, 10k, & 5k Race Results

Starting Time

The half marathon start time is 8:00 AM.


To reserve your spot in the 2023 Ned Ned Run Half Marathon, 10k, & 5k, you can use the registration link here.

Race Fees

Online registration closed.

Ned Ned Run Half Marathon, 10k, & 5k Race Website

Ned Ned Run Half Marathon, 10k, & 5k Website

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