Showing 5 events within 50 km in the next 365 days.
Date/Time: June 28th, 2026
Short Course (XCC): 8:00am-9:00am
Marathon (XCM): 9:30am-12:15pm
Cross Country (XCO): 9:30am-12:00pm
Location: Cone Park - 3800 Line Dr, Sioux City, IA 51106
This is the third event of the 2026 Nebraska Off-Road Series. For more details on the race, or the series please visit neoffroadseries.com
The rain date for this event is October 3rd
Use Code “THANKSOV” for free Junior race category registration!
To participate in any of our events you must have a USA-Cycling License.
You will be able to purchase a license within the registration process.
Join us for the Heatwave Half Marathon, 10K, & 5K!
A sun-soaked summer challenge that’s perfect for the whole family.
The fun includes –
Great Swag – designer shirt & custom medal
Chip-timing with live results and awards
Free photos
FREE ice cream at the finish to help you cool off
Plenty of hot fun in the summer sun!
Grab your friends and family—you won’t want to miss this one!
Can’t make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag!
Youth-based pricing is available: ages 12 & under are only $17!
Half Marathon/10K/5K registration includes a custom bib, designer shirt, and an awesome finisher medal!
1 Mile registration is untimed and includes a custom bib, designer shirt, and an awesome finisher medal!
Kid’s Dash is a fun, untimed dash for ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specially crafted medal for our youngest runners! (If your child wants to run the kid’s dash without swag, they’re welcome to run free on race day!)
Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!
Mighty Mo Marathon – Sioux City’s Premier Running Event
The Mighty Mo Marathon is back with an all‑new, flat, runner‑friendly three‑state course—and for the first time ever, prize money is on the line. Sioux City’s signature running event features something for every athlete: Kids Run • 5K • 10K • Half Marathon • Full Marathon • The “STOOGE” Challenge All events offer flat, fast, and fun routes.
Starting and finishing inside the Siouxland Expo Center, runners will enjoy scenic miles along the Missouri River Trail, complete with shade, smooth surfaces, and plenty of space to fly.
Proceeds support the H.A.R.T. Program (Helping Athletes Run & Train), empowering athletes of all ages and abilities.
Course Highlights
Half Marathon: Returns to its popular flat and fast out‑and‑back design.
Full Marathon: Newly redesigned course with beautiful river views, abundant shade, and an indoor start/finish experienc
Join us for the annual Hometown Half Marathon & 5k/10k! A run local-themed event that is perfect for the whole family.
The fun includes -
Great Swag - designer shirt & custom medal
Chip-timing with live results and awards
Pacers for the half marathon
Free photos
Delicious Treats waiting at the finish line
Plenty of fun!
*Youth-based pricing for the 5k/10k, 12 & Under are only $17!
Half Marathon Registration includes a custom bib, designer shirt, and an awesome finisher medal!
10k registration includes a custom bib, designer shirt, and an awesome finisher medal!
5k registration includes a custom bib, designer shirt, and an awesome finisher medal!
1 Mile registration is untimed and includes a custom bib, designer shirt, and an awesome finisher medal!
The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specifically crafted medal for our kids' dash event! (If your child wants to run the kid's dash, and doesn't want the SWAG, they are welcome to run with us on race day for free!)
*Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!