Dirty Dirty 15K
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Event overview
The Dirty Dirty is a 15k trail race held on Saturday, November 22, 2025, at the River Grove Picnic Area in North Chagrin Reservation, Willoughby Hills, OH (2944 River Rd). It is the final race of the 2025 Dirty Trail Series and is run as a two-loop course through the Cleveland Metroparks' North Chagrin Reservation. The course runs through woodlands and meadows and passes landmarks including Squires Castle, Buttermilk Falls, and Oxbow Lagoon.
Registration, course support and awards
Registration prices vary by date: early through October 22 ($50), regular October 23 to November 11 ($60), and late November 12 to 22 ($65). Donations collected benefit the Trails Division of Cleveland Metroparks. All participants receive a finisher medal and an item from the grab bag. Fluid stations on course will serve water and Skratch hydration; participants are encouraged to carry water. Awards are given to the top three overall male and female finishers and to the top three male and female finishers in 5-year age groups from 14 & under through 70 & over. Visit the organization's website for the most recent information.