The 2026 The Mighty Mo Races has concluded.

The Mighty Mo Races

Race complete

Sioux City, IA, USA · September 13, 2026

57°·61° high·Light·Dry

Race Day Weather

57°at start

62° high

Light

Dry

Warm day, light rain risk

Runners will face a starting temperature of 60°F, climbing to 71°F by the finish, with high humidity at 80%. Winds will be a headwind throughout at 14 mph, which may impact pacing. Given the warm conditions and potential light rain, adjusting pace early and ensuring hydration will be crucial.

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Pace Calculator

Distance: 26.2mi

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Race Info

Mighty Mo Run is a three-day running weekend in Sioux City, Iowa, with a Friday 5K, a Saturday 10K and kids run, and a Sunday half marathon. A full marathon was added for 2026, crossing Iowa, Nebraska, and South Dakota via a newly opened pedestrian bridge and offering prize money for the first time. The race starts and finishes at the Seaboard Triumph Foods Expo Center and benefits the H.A.R.T. Foundation (Helping Athletes Run & Train).

Website

Race weekend

Sunday, September 13

6:30 AMMarathon (26.2 mi)

Half Marathon (13.1 mi)

10K (6.2 mi)

5K (3.1 mi)

Course Map

FAQ

When is the 2026 The Mighty Mo Races?

The 2026 The Mighty Mo Races will be held on Sunday September 13, 2026.

Is the The Mighty Mo Races a Boston Marathon Qualifier?

Yes, the The Mighty Mo Races is an official Boston Marathon qualifier.

What is the time limit for the The Mighty Mo Races?

The time limit for the The Mighty Mo Races is 6.5 hours.

What will the weather be like for the 2026 The Mighty Mo Races?

The forecast calls for a high of 62°F and a low of 52°F with a 100% chance of rain.

Historical Weather

Based on 5 years of data

Avg Temp

70°F

L:60° H:81°

RunScore

Conditions

Rain Freq

0 of 5 yrs

Wind8mph

Dew62°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 The Mighty Mo Races Becoming cloudy in the afternoon with rain. 2025	65°/86°	-	67°
2024 The Mighty Mo Races Clear conditions throughout the day. 2024	65°/84°	-	66°
2023 The Mighty Mo Races Clear conditions throughout the day. 2023	46°/71°	-	51°
2022 The Mighty Mo Races Clear conditions throughout the day. 2022	57°/79°	-	61°
2021 The Mighty Mo Races Clear conditions throughout the day. 2021	66°/84°	-	64°

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