Naperville Trails Half Marathon & 10K

The Naperville Trails Half Marathon & 10K takes place largely within the scenic Danada Forest Preserve, offering a fast and runnable off-road profile. Instead of rocky technical singletrack, the course predominantly features wide, crushed limestone paths that weave through open prairie meadows, woodlands, and wetland corridors. The terrain is notably flat with minimal elevation variation, making it approachable for both trail novices and runners targeting personal bests across the half marathon and 10K distances.

Despite the smooth footing, race day brings distinct surface dynamics. The course concludes on grass around the historic Danada horse training track, which can become slick or heavy depending on early morning dew or rain. The lack of steep climbs allows you to settle into a consistent rhythm, but the open prairie sections expose runners to direct sun and persistent winds, demanding calculated hydration and effort management throughout.

Traveling to Naperville is straightforward for out-of-town participants. The city sits along the Interstate 88 corridor in Chicago's western suburbs, located roughly 30 miles southwest of Chicago O'Hare International Airport (ORD) and 30 miles west of Chicago Midway International Airport (MDW). For accommodations, look along the I-88 business corridor or in downtown Naperville, both of which provide quick road access to the Danada Forest Preserve area and surrounding parking hubs.

Early September in northeastern Illinois typically brings mild mornings with temperatures in the upper 50s to low 60s Fahrenheit, warming into the mid-70s or low 80s by midday, occasionally accompanied by late-summer humidity. On-site parking at Danada is limited, so plan to arrive early to utilize the designated remote shuttle parking lots arranged in nearby Lisle. Take advantage of advance packet pickup options to streamline your race morning routine.