When is the I-35 Challenge?

The I-35 Challenge most recently ran on Saturday, October 17, 2026. A new date has not been announced yet — this page updates daily as the organiser posts one.

Where does the I-35 Challenge start?

The I-35 Challenge starts at Kansas City, MO & Des Moines, IA in Kansas City, MO.

What distances does the I-35 Challenge offer?

The I-35 Challenge offers I-35 Challenge - Kansas City Marathon & Des Moines Marathon, I-35 Challenge - Kansas City Marathon & Des Moines Half Marathon, I-35 Challenge - Kansas City Half Marathon & Des Moines Marathon, I-35 Challenge - Kansas City Half Marathon & Des Moines Half Marathon and I-35 Challenge ONLY (already signed up for KC and Des Moines).

Kansas City, MO

I-35 Challenge

The I-35 Challenge is a partnership between the Garmin Kansas City Marathon and IMT Des Moines Marathon , offering the challenge of completing both races on concurrent weekends. Participants can do any of the following combinations of events to complete the I-35 Challenge: Marathon in Kansas City and Marathon in Des…

Start line: Kansas City, MO & Des Moines, IA

This race has passed

The 2026 running was Saturday, October 17, 2026. No 2027 date is announced yet — this page updates daily as the organiser posts one.

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Past editions

I-35 Challenge — ran Saturday, October 17, 2026

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Frequently asked

When is the I-35 Challenge?: The I-35 Challenge most recently ran on Saturday, October 17, 2026. A new date has not been announced yet — this page updates daily as the organiser posts one.
Where does the I-35 Challenge start?: The I-35 Challenge starts at Kansas City, MO & Des Moines, IA in Kansas City, MO.
What distances does the I-35 Challenge offer?: The I-35 Challenge offers I-35 Challenge - Kansas City Marathon & Des Moines Marathon, I-35 Challenge - Kansas City Marathon & Des Moines Half Marathon, I-35 Challenge - Kansas City Half Marathon & Des Moines Marathon, I-35 Challenge - Kansas City Half Marathon & Des Moines Half Marathon and I-35 Challenge ONLY (already signed up for KC and Des Moines).

Listed on RunSignup. 1 past edition recorded. Race details are the organiser’s — confirm the date and start time with them before you travel.