2026 Heartland Series - Day 5 (IA)

Prepare for a memorable challenge at the 2026 Heartland Series - Day 5 (IA) on July 15, 2026, in Clinton, IA. Hosted by Mainly Marathons, renowned for organizing races across all 50 states, this event is designed for runners who love to go the distance and welcomes all paces with a generous no-time-limit policy and a "no runner left behind" philosophy. Join a "loony community" of supportive runners, where even the last finisher earns a coveted "caboose" award. The event offers 5K, 10K, Half Marathon, Marathon, and 50K distances, ensuring an option for every endurance level.

The course, situated on Discovery Trail at 25th Ave. N. and Grant St. near the Sawmill Museum, features a smooth asphalt surface with some gentle elevation changes, approximately 23 feet per lap, offering a mix of river and city views along the scenic greenway of the Mississippi River. Expect typical race day conditions in mid-July with highs around 84°F and lows around 66°F, with a 15% chance of precipitation. Runners can look forward to an unparalleled aid station experience, a signature of the Heartland Series, boasting a single, gigantic station stocked with everything from fruit and jelly beans to sandwiches, water, Gatorade, and hot coffee, so you won't need to carry extensive supplies. Medals are uniquely shaped like the state of Iowa, and for those completing multiple races in the series, they connect to form a larger commemorative piece.