Mighty Mo Run

About the Event

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

Races Offered

Sioux City Mighty Mo 5K

Sep 11, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

18:30

sell

$30.00

The "STOOGE" Run 5K - 10K - Half Marathon

Sep 11, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

18:30

sell

$130.00

Sioux City Mighty Mo 10K

Sep 12, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

07:30

sell

$35.00

1K Kid's Run

Sep 12, 2026

straighten

Distance — 1K

terrain

Type — Running

timer

09:30

sell

$10.00

Sioux City Mighty Mo Full Marathon

Sep 13, 2026

straighten

Distance — 26.2 Miles

terrain

Type — Running

timer

06:30

sell

0.00

Sioux City Mighty Mo Half Marathon

Sep 13, 2026

straighten

Distance — 13.1 Miles

terrain

Type — Running

timer

07:00

sell

$70.00

Weather History

These values represent the 3-year monthly averages for September in Sioux City.

thermostat Temperature

15.5° / 26.5°

wb_sunny Feels like

14.0° / 24.6°

light_mode Avg sunshine hours

10h 50m

water_drop Avg rainfall

1.5 mm

ac_unit Avg snowfall

—

air Avg wind speed

13.2 km/h (Gentle breeze)

opacity Sweat loss rate

High

terrain Course conditions

Hard and dry surface

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

63.8%

wb_twilight Sunrise

07:05

nightlight Sunset

19:33

About Sioux City

Learn more about the host city, Sioux City.

Sioux City is on the western edge of the state of Iowa. It is on the Missouri River and many parts of Sioux City are among the unique Loess Hills formations.