Sunday, October 19

I-35 Challenge

Experience the ultimate running adventure at the I-35 Challenge on October 18th-19th, 2025, in vibrant Kansas City, Jackson. This event dares participants to push their limits by conquering races at the Garmin Kansas City Marathon and the IMT Des Moines Marathon on back-to-back weekends. Choose from various challenges, such as completing full marathons in both cities or opting for half marathons at either location. Whether you're a seasoned marathoner or a dedicated half marathon enthusiast, the I-35 Challenge guarantees an unforgettable experience filled with camaraderie and the excitement of race day. Don't miss this unique opportunity to test yourself while savoring the scenic beauty of two incredible cities!