cheap. dirty. fun.
Des Moines Dirty Duathlon & Trail Festival
THE DIRTY DUATHALON
The Des Moines Dirty Duathlon is Central Iowa Trails Association's annual mountain biking/trail running race held at Center Trails at Greenwood Park in Des Moines, Iowa.
100% of the proceeds go towards maintaining and building local singletrack trails in the Des Moines Metro.
*Registration is Online ONLY.
No day-of registration. No refunds. Get me Registered offers cancellation insurance, we encourage you to opt in.
Member Discount: If you’re an active CITA Member (IMBA Member) a $5 discount is available. On the registration site, click on the Contact the Organizers button on the left-hand side of the page to get the code. Please wait to register until you have the code. Not a member? Join CITA today.
HOW IT WORKS
Trail Run, Mountain Bike or do both:
Dirty Du (Solo or Relay) - 1 lap of 3 miles trail run, then 2 laps of about 6 miles mountain bike.
Youth MTB Race - Wave starts for elementary through high school; 2 laps of about 6 miles mountain bike
Kids Race -| 1 lap run or 1 lap bike on designated kids course
THE COURSE & LOCATION
Location: Center Trails at Greenwood Park
The Course: Incorporating professionally built singletrack throughout Greenwood Park in Des Moines, the course takes you through an old growth forest, including super fun, flowy downhill, a creek crossing, and plenty of lung-busting climbing.
Start and Finish is at Jay Spence Shelter in Greenwood Park near Bergman Academy.
DATE: October 17th, 2026 !!!
The Central Iowa Trail Association invites you to celebrate our trail network! This event welcomes participants of all ages, including bikers, runners, hikers, and families. Enjoy a day packed with fun activities highlighting Central Iowa's wonderful outdoor resources, featuring the Dirty Duathlon race
Explore our vendor booths to discover exceptional trail user resources! Delicious food and refreshing drinks will be provided by Thirsty Pigs and available for purchase
Dirty Du Timeline:
8:00 AM: Dirty Duathlon Begins
10:00 AM: Youth MTB Race (Wave starts for elementary through high school)
10:40 AM: Strider/Little Kids Race (Yard Lap)
Trail Fest Timeline:
10:00 AM: Vendor booths
11:00 AM: Yoga Session in the Yard provided by Power Life
11:00 AM - 1 PM: MTB Skills Sessions offered by Kilowatt Coaching
11:30 AM: Group Trail Run
1:00 PM: Group MTB Ride
1:30 PM: Group MTB Ride - Beginners and families
2:30 PM: Group Trail Hike & Walk lead by Roccasecca Fitness
4:00 PM: Group MTB Ride
LOCATION: Center Trails at Greenwood Park
Jay Spence Shelter 100 45th Street,
Des Moines, IA 50312
VOLUNTEERS NEEDED
All hands on deck! We need volunteers!
We are using Golden Volunteer this year to register volunteers.
Questions?
Email us at: dirtydu@centraliowatrails.com
LOCAL RACE SUPPORTERS
The Dirty Du is CITA’s largest race and fundraising event. Help us make it a successful one by becoming a sponsor!
RACE PHOTOS FROM PREVIOUS YEARS
Trail Festival
Exhibitors will be at the Dirty Du from 8:30AM - 4PM !
Stay Tuned for Full List of Participating Groups!
Vendors/Exhibitors at Trail Fest: