DATE: november 11, 2017 - Note full race time change to 12:00 due to rain forecast!! Kid's race now at 11:30!


2017 Race Information: 

Pictures from the Race:

Sprint Race Results:

Full Race Results: 


The Des Moines Dirty Duathlon is Central Iowa Trails Association's annual bike / run race on single-track trails.

Join us for a fun day of mountain biking and trail running on Center Trails at Greenwood Park!

100% of the proceeds go toward maintaining and building our local single-track trails!

The course will incorporate professionally built single-track that passes through an old growth forest, including super fun, flowy downhill, a creek crossing, and plenty of lung-busting climbing.

Rock the Duathlon on your own, or partner up (1 runner, 1 cyclist) if you’re not ready to tackle the whole thing alone.

The free kids race will be either a "1 lap run and 1 lap bike", or "2 laps run and 2 laps bike" depending on ability. This will be held in the grassy area by the shelter and will not be utilizing the dirt trails.

Pizza provided by Papa Johns Pizza following the race!




$30.00 pre-registration ($35.00 day-of via check or cash)

$60.00 relay pre-registration – each person registers on the website ($70.00 day-of via check or cash)

Kids - FREE and do not need to pre-register (waivers needed from parent day-of)

**Choice of T-shirt (same as 2016) or bottle, while supplies last!


**Unique awards will also be presented to:

Top 2 males in Sprint
Top 2 females in Sprint
Top 3 males in solo Dirty Duathlon
Top 3 Masters males in solo Dirty Duathlon
Top 3 females in solo Dirty Duathlon
Top 3 coed relay teams
Top 3 male relay teams
Top 3 female relay teams


Want to race on our amazing single-track trails but aren’t ready to conquer both the run and bike?

We will work to set you up with a perfect partner, so be sure to mention if you are a biker or runner and if you are “in it to win it” or “just along for the fun”.

Contact and let us know!


Friday Night (November 10) Packet Pickup and last minute registration: 
5:30-7:00 at REI in West Des Moines (5901 Mills Civic Pkwy)

Saturday (November 11), Race Day: 

8:30 to 9:45 - Sprint Duathlon (Solo and Relay)packet pickup and late registration
8:30 to 11:15 - FREE Kids Duathlon registration
8:30 to 11:30 - Dirty Duathlon (Solo and Relay) packet pickup and late registration
10:00 - Sprint Duathlon (Solo and Relay) - 2.2-mile trail run, 6-mile mountain bike
11:30 - Kids Duathlon (FREE) - 1 or 2 laps run around the park, 1 or 2 laps bike around the park
12:00   - Dirty Duathlon (Solo and Relay) - 2.2-mile trail run, 10-mile mountain bike, 2.2-mile trail run




We will be racing clockwise on the trails. See Map

Greenwood Park
100 45th St, Des Moines IA

Start and Finish will be near the Jay Spence Shelter at Greenwood Park - from Grand Avenue, turn south onto 45th Street, then left up the hill toward the Bergman Academy.  At the top of the hill is parking, we're at the shelter to the north of Jay Spence.


Even if you don't bike or run in the Dirty Duathlon, we always welcome volunteers! Contact .


2016 REsults:


Relay and Solo


Congratulations to all the racers!

Thank you to everyone that participated, and our sponsors - see you next year!