Mighty Mo Run

Sioux City, Iowa's Mighty Mo Run is a multi-distance weekend celebrating running on the Missouri River Trail. Starting and finishing at the Siouxland Expo Center, the event features a Kids Run, 5K, 10K, and a Half Marathon, plus the new The Stooge Run for completing all three days, offering a unique finisher's award. The atmosphere is described as flat, fast, and fun, with all courses designed to be spectator-friendly.

Due to flooding adjustments, the half-marathon course has been updated, and the full marathon has been canceled for reconstruction—with plans to bring it back in 2026 as a 3-state race. Proceeds support the HART Foundation. Visit the organization's website for the most recent information.