I-35 Challenge
Kansas City, MO
Sat, Oct 17, 2026
In 11 days · Sat, Oct 17, 2026
Don't let race day sneak up
One email during race week. That's it.
Saturday, October 17th, 2026
Kansas City, MO & Des Moines, IA, Kansas City MO
See race page
50–68°F · low rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
65–84°F
rain
2024
43–66°F
dry
2023
41–68°F
dry
2022
37–48°F
dry
2021
43–70°F
dry
2020
52–70°F
dry
2019
42–66°F
dry
2018
42–63°F
dry
2017
51–69°F
dry
2016
73–85°F
dry
Best months to race in Missouri →
Race week?
Don't forget the small stuff.
Gels, anti-chafe, throwaway layers — the checklist runners re-buy every race.
Race-day forecast · Saturday, Oct 17
Rain likely · 45–62°F
Saturday, Oct 17starts near 45°F · 3% chance of rain · wind up to 5 mph
About this race
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
Course map
Train with a club
Run clubs near Kansas City to train with before race day.
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.