Fox Valley Winter Challenge Trail Series 8K

Fox Valley Winter Challenge Trail Series 8K is run at Oakhurst Forest Preserve in Aurora, Illinois, on February 20, 2027, starting at 10:00 a.m. The single distance is an 8K, roughly 5 miles, on trail, and it opens with a steep climb. Snow, ice and mud are all part of the bargain at this point in the calendar. The race is one of three in the Winter Challenge Trail Series, and you can enter more than one of them.

Winter trail racing is a footing problem as much as a fitness one. Shoes with real tread, and a warm-up long enough that the opening climb does not shock your legs, will matter more here than any taper. Finishers collect a custom medal along with cold-weather gear, and the series format gives you a reason to keep training through the months when most runners go quiet.