Mighty Mo Run
The Mighty Mo Run offers a flat, fast course along the Missouri River, suitable for all runners.
Race Date
Sep 11, 2026
Location
Sioux City, IA
Quick facts
- Date
- Friday, September 11, 2026
- Location
- Sioux City, Iowa
- Distance
- Half marathon (13.1 mi) + 10K, 5K, 1K Kid's Run, The "STOOGE" Run 5K - 10K - Half Marathon, 26.2 Miles
- Course
- Out & Back
- Terrain
- Road
- USATF certified
- Yes
- Finishers on record
- 455
Highlights
Good For
Atmosphere
Course
The Experience
The Mighty Mo Run in Sioux City, Iowa, presents a flat and fast race experience, perfect for setting personal bests. The event, first run in 2021 and now in its fifth year, typically sees around 88 finishers, with a growing field and a loyal 22% repeat-runner rate.
Runners will enjoy scenic miles along the Missouri River Trail, featuring shade and smooth surfaces. The half marathon is a popular flat and fast out-and-back design, while the full marathon boasts newly redesigned river views and abundant shade. Both start and finish inside the Siouxland Expo Center, offering a unique indoor experience.
With multiple distances including a 10K, 5K, and Kid's Run, the Mighty Mo Run caters to a wide range of participants. Proceeds from the event support the H.A.R.T. Program, empowering athletes of all abilities.
Race-provided description
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
Logistics
Race Day
Friday, September 11, 2026
Start Time
7:00 AM
Giveaway
T-Shirt
Start Location
Siouxland Expo Center, Sioux City, IA, 51101
Course Info
USATF CertifiedCourse Type
Out & Back
Terrain
road
Scenery
Lake River
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
USATF Certified Course
IA21001GM · Mighty Mo Half Marathon
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Quality Score
Standout615 years running
~88 finishers a year
growing or steady
22% returning runners
USATF certified · 5 timing sources · 8 photos
runners from 1 state
winner 1:19:01
typical high 81°F
Race Day Weather
5-year historical avgStart (Low)
61°
Afternoon (High)
81°
Hot conditions — adjust pace expectations, prioritize hydration
0.1"
Precipitation
12 mph
Wind
62%
Humidity
Historical Finish Times
How 455 finishers actually crossed the line across 5 years.
Most recent
2025
Total finishers
455
Median time
2:04:28
Latest turnout
88
States
1
Turnout by year
2021–2025
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the Mighty Mo Run?
The Mighty Mo Run is held on Friday, September 11, 2026, starting at 7:00 AM.
Where does the Mighty Mo Run take place?
It takes place in Sioux City, Iowa.
What distances does the Mighty Mo Run offer?
The half marathon (13.1 miles), plus 10K, 5K, 1K Kid's Run, The "STOOGE" Run 5K - 10K - Half Marathon, 26.2 Miles.
Is the Mighty Mo Run course flat and good for a PR?
The Mighty Mo Run is a ultra-flat, out & back course. The course is USATF-certified, so finish times can be used for qualifying.
How many people run the Mighty Mo Run?
HalfRuns has finish records for 455 runners who have completed the Mighty Mo Run.
HalfRuns editorial — independent, no paid placement.
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