I-35 Challenge
- Date
- October 17–18, 2026
- Distance
- 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 & more
From the Organizer
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 Moines
- Marathon in Kansas City and Half Marathon in Des Moines
- Half Marathon in Kansas City and Marathon in Des Moines
- Half Marathon in Kansas City and Half Marathon in Des Moines
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
68°
Typical Low
48°
Chance of Rain
22%
Based on US Climate Normals data from Kansas City Downtown Ap, 2 mi from the venue.
Host City
About Kansas City, MO
Population
508,233
as of 2023
Elevation
754 ft
Nearest Airport
MCI
Kansas City International Airport · 15 mi
Time Zone
Central Time
From Endurance Grid
A big city race. Expect multiple lodging options and plenty to do the day before.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at I-35 Challenge, put it on the calendar, and turn “someday” into a start date.
131
Days to train
- Race
- I-35 Challenge
- Date
- October 17–18, 2026
Coming Up
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8K
Less than a mile away
Eagle 5K, 10K, & 13.1M at Kansas City, MO (27)
Half Marathon · 10K · 5K
Less than a mile away
Bagel Run 5K/10K/13.1 KANSAS CITY
Half Marathon · 10K · 5K
Less than a mile away
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From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the I-35 Challenge?
- I-35 Challenge is a running race held in Kansas City, Missouri on October 17, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the I-35 Challenge?
- Saturday, October 17, 2026 in Kansas City, Missouri at Kansas City, MO & Des Moines, IA, Kansas City, MO. Check the event page for exact start times and wave schedules.
- How do I register for the I-35 Challenge?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
I-35 Challenge
Oct 17, 2026